Statistical temperature profile retrievals in clear-air using passive 118-GHz O2 observations. - Albin J. Gasiewski; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 1993)

Third Stokes parameter emission from a periodic water surface. - Joel T. Johnson; Jin Au Kong; Robert T. Shin; David H. Staelin; Kevin O'Neill; A. W. Lananick (IEEE Trans. Geosci. Remote. Sens., 1993)

Applications of numerical models for rough surface scattering. - Joel T. Johnson (1996)

A numerical study of the composite surface model for ocean backscattering. - Joel T. Johnson; Robert T. Shin; Jin Au Kong; Leung Tsang; Kyung Pak (IEEE Trans. Geosci. Remote. Sens., 1998)

A numerical study of ocean polarimetric thermal emission. - Joel T. Johnson; Robert T. Shin; Jin Au Kong; Leung Tsang; Kyung Pak (IEEE Trans. Geosci. Remote. Sens., 1999)

Theoretical study of the small slope approximation for ocean polarimetric thermal emission. - Joel T. Johnson; Min Zhang (IEEE Trans. Geosci. Remote. Sens., 1999)

Formulation of forward-backward method using novel spectral acceleration for the modeling of scattering from impedance rough surfaces. - Hsi-Tseng Chou; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2000)

High resolution Ka-band images of a small tree: measurements and models. - Hyunjun Kim; Joel T. Johnson; Brian A. Baertlein (IEEE Trans. Geosci. Remote. Sens., 2000)

A numerical model for electromagnetic scattering from sea ice. - Elias M. Nassar; Joel T. Johnson; Robert Lee (IEEE Trans. Geosci. Remote. Sens., 2000)

A novel acceleration algorithm for the computation of scattering from two-dimensional large-scale perfectly conducting random rough surfaces with the forward-backward method. - Danai Torrungrueng; Hsi-Tseng Chou; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2000)

Time statistics of propagation over the ocean surface: a numerical study. - Baran U. Ungan; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2000)

Thermal emission from a layered medium bounded by a slightly rough interface. - Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2001)

Coupled canonical grid/discrete dipole approach for computing scattering from objects above or below a rough interface. - Joel T. Johnson; Robert J. Burkholder (IEEE Trans. Geosci. Remote. Sens., 2001)

A numerical study of backscattering from time-evolving sea surfaces: comparison of hydrodynamic models. - Joel T. Johnson; Jakov V. Toporkov; Gary S. Brown (IEEE Trans. Geosci. Remote. Sens., 2001)

Comparison of modeled and measured second azimuthal harmonics of ocean surface brightness temperatures. - Min Zhang; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2001)

Remote sensing of rough surface spectra with multi-frequency microwave radiometry. - Yonghun Cheon; Joel T. Johnson; David R. Wiggins (IGARSS, 2002)

Implementation of the higher order small slope approximation for scattering from a Gaussian rough surface. - M. S. Gilbert; Joel T. Johnson (IGARSS, 2002)

Further numerical studies of backscattering from time evolving non-linear sea surfaces. - Alfonso R. Hayslip; Joel T. Johnson; Gregory R. Baker (IGARSS, 2002)

Sub-surface object sensing with multi-frequency microwave radiometry. - David R. Wiggins; Hyunjun Kim; Yonghun Cheon; Joel T. Johnson (IGARSS, 2002)

Comparison of the physical optics and small slope theories for polarimetric thermal emission from the sea surface. - Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2002)

A theoretical study of sea surface up/down wind brightness temperature differences. - Joel T. Johnson; Yongyao Cai (IEEE Trans. Geosci. Remote. Sens., 2002)

Subsurface object sensing with a multifrequency microwave radiometer. - Joel T. Johnson; Hyunjun Kim; David R. Wiggins; Yonghun Cheon (IEEE Trans. Geosci. Remote. Sens., 2002)

Radar image study of simulated breaking waves. - Hyunjun Kim; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2002)

Characterization of L-band RFI and implications for mitigation techniques. - Steven W. Ellingson; Grant A. Hampson; Joel T. Johnson (IGARSS, 2003)

Design of an L-band microwave radiometer with active mitigation of interference. - Steven W. Ellingson; Grant A. Hampson; Joel T. Johnson (IGARSS, 2003)

A study of sea emission models for WindSat. - Joel T. Johnson; W. H. Theunissen; Steven W. Ellingson (IGARSS, 2003)

Antidotes for Anthrax Anecdotes. - Charles R. Berger; Joel T. Johnson; Eun-Ju Lee 001 (Commun. Res., 2003)

Gender, Rationality, and Base-Rate Explanations for Increasing Trends. - Charles R. Berger; Eun-Ju Lee 001; Joel T. Johnson (Commun. Res., 2003)

Further numerical studies of backscattering from time-evolving nonlinear sea surfaces. - Alfonso R. Hayslip; Joel T. Johnson; Gregory R. Baker (IEEE Trans. Geosci. Remote. Sens., 2003)

Calculation of the fourth order small slope theory of thermal emission from the sea surface. - Metin A. Demir; Joel T. Johnson (IGARSS, 2004)

A study of rough surface thermal emission and reflection using Voronovich's small slope approximation. - Joel T. Johnson (IGARSS, 2004)

Airborne radio frequency interference studies at C-band using a digital receiver. - Joel T. Johnson; Albin J. Gasiewski; Grant A. Hampson; Steven W. Ellingson; Rangarajan Krishnamachari; Marian Klein (IGARSS, 2004)

Design and demonstration of an interference suppressing microwave radiometer. - Joel T. Johnson; Grant A. Hampson; Steven W. Ellingson (IGARSS, 2004)

Optical theorem for electromagnetic scattering by a three-dimensional scatterer in the presence of a lossless half space. - Danai Torrungrueng; Baran U. Ungan; Joel T. Johnson (IEEE Geosci. Remote. Sens. Lett., 2004)

A study of scattering from an object below a rough surface. - Joel T. Johnson; Robert J. Burkholder (IEEE Trans. Geosci. Remote. Sens., 2004)

A numerical study of buried biomass effects on ground-penetrating radar performance. - Nakasit Niltawach; Chi-Chih Chen; Joel T. Johnson; Brian A. Baertlein (IEEE Trans. Geosci. Remote. Sens., 2004)

Sky observations at L-band with an interference suppressing microwave radiometer. - Noppasin Niamsuwan; Joel T. Johnson (IGARSS, 2005)

A study of ocean-like surface thermal emission and reflection using Voronovich's small slope approximation. - Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2005)

Comparison of Surface Scattering Models for Gaussian and Exponential Surfaces. - Alongkorn Darawankul; Joel T. Johnson; Kun-Shan Chen (IGARSS, 2006)

High Altitude Measurements of C-band Radio Frequency Interference Using a Digital Receiver. - Joel T. Johnson; Albin J. Gasiewski; Baris Güner; M. Valerio; Marian Klein (IGARSS, 2006)

A Study of Wind Direction Signals in WindSat Linearly Polarized Channels. - Praphun Naenna; Joel T. Johnson (IGARSS, 2006)

Observations of an ARSR System in Canton, MI with the L-band Interference Suppressing Radiometer. - Noppasin Niamsuwan; Baris Güner; Joel T. Johnson (IGARSS, 2006)

Studies of Ocean Surface Profile Retrieval from Simulated LGA Radar Data. - Guangdong Pan; Robert J. Burkholder; Joel T. Johnson; Jakov V. Toporkov; Mark A. Sletten (IGARSS, 2006)

A Numerical Study of the Modulation of Short Sea Waves by Longer Waves. - Guangdong Pan; Joel T. Johnson (IGARSS, 2006)

A polarimetric survey of radio-frequency interference in C- and X-bands in the continental united states using WindSat radiometry. - Steven W. Ellingson; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2006)

An efficient two-scale model for the computation of thermal emission and atmospheric reflection from the sea surface. - Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2006)

Airborne radio-frequency interference studies at C-band using a digital receiver. - Joel T. Johnson; Albin J. Gasiewski; Baris Güner; Grant A. Hampson; Steven W. Ellingson; Rangarajan Krishnamachari; Noppasin Niamsuwan; Eric M. McIntyre; Marian Klein; Vladimir Ye. Leuski (IEEE Trans. Geosci. Remote. Sens., 2006)

A numerical study of the modulation of ShortSea waves by longer waves. - Guangdong Pan; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2006)

The reduced local curvature approximation for rough surface scattering. - Tanos M. Elfouhaily; Joel T. Johnson (IGARSS, 2007)

Cross frequency blanking for RFI mitigation: A C-band case study. - Joel T. Johnson; Baris Guner (IGARSS, 2007)

Foreword to the Special Issue on Subsurface Sensing Using Ground-Penetrating Radar (GPR). - Chi-Chih Chen; Joel T. Johnson; Motoyuki Sato; Alexander G. Yarovoy (IEEE Trans. Geosci. Remote. Sens., 2007)

Band-Limited Exponential Correlation Function for Rough-Surface Scattering. - Alongkorn Darawankul; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2007)

Fourth-Order Small-Slope Theory of Sea-Surface Brightness Temperatures. - Metin A. Demir; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2007)

A New Model for Rough Surface Scattering. - Tanos M. Elfouhaily; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2007)

Time and Frequency Blanking for Radio-Frequency Interference Mitigation in Microwave Radiometry. - Baris Güner; Joel T. Johnson; Noppasin Niamsuwan (IEEE Trans. Geosci. Remote. Sens., 2007)

Computation of Oceanlike Surface Thermal Emission and Bistatic Scattering With the Reduced Local Curvature Approximation. - Joel T. Johnson; Tanos M. Elfouhaily (IEEE Trans. Geosci. Remote. Sens., 2007)

On the Geometrical Optics (Hagfors' Law) and Physical Optics Approximations for Scattering From Exponentially Correlated Surfaces. - Joel T. Johnson; Karl F. Warnick; Peng Xu (IEEE Trans. Geosci. Remote. Sens., 2007)

Compensation of Faraday Rotation in Multi-Polarization Scatterometry. - Mark Frankford; Joel T. Johnson (IGARSS (2), 2008)

On the Shapiro-Wilk Test for the Detection of Pulsed Sinusoidal Radio Frequency Interference. - Baris Guner; Mark Frankford; Joel T. Johnson (IGARSS (2), 2008)

A Study of Algorithms for Detecting Pulsed Sinusoidal Interference in Microwave Radiometry. - Joel T. Johnson; Lee C. Potter (IGARSS (2), 2008)

Monte Carlo Simulation of Altimeter Pulse Returns and Electromagnetic Bias. - Praphun Naenna; Joel T. Johnson (IGARSS (5), 2008)

Low Frequency Sea and Ice Sheet Impulse Responses Acquired by the Global Ice Sheet Mapping Orbiter (GISMO) Demonstrator. - Noppasin Niamsuwan; Joel T. Johnson (IGARSS (2), 2008)

A Numerical Method for Studying Modulation Effects in Radar Observations of the Sea Surface. - Guangdong Pan; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2008)

Performance Analysis of a Cross-frequency Detector of Pulsed Sinusoidal RFI in Microwave Radiometry. - Baris Guner; Joel T. Johnson; Ninoslav Majurec (IGARSS (2), 2009)

Airborne L-band RFI Observations in the smapvex08 Campaign with the L-band Interference Suppressing Radiometer. - Ninoslav Majurec; James Park 001; Noppasin Niamsuwan; Mark Frankford; Joel T. Johnson (IGARSS (2), 2009)

A Study of the Shapiro-Wilk Test for the Detection of Pulsed Sinusoidal Radio Frequency Interference. - Baris Güner; Mark Frankford; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2009)

A Numerical Study of the Retrieval of Sea Surface Height Profiles From Low Grazing Angle Radar Data. - Joel T. Johnson; Robert J. Burkholder; Jakov V. Toporkov; David Lyzenga; William J. Plant (IEEE Trans. Geosci. Remote. Sens., 2009)

Through-Wall Sensing With Multifrequency Microwave Radiometry: A Proof-of-Concept Demonstration. - Joel T. Johnson; Metin A. Demir; Ninoslav Majurec (IEEE Trans. Geosci. Remote. Sens., 2009)

Performance Study of Algorithms for Detecting Pulsed Sinusoidal Interference in Microwave Radiometry. - Joel T. Johnson; Lee C. Potter (IEEE Trans. Geosci. Remote. Sens., 2009)

Microwave Radiometer Radio-Frequency Interference Detection Algorithms: A Comparative Study. - Sidharth Misra; Priscilla N. Mohammed; Baris Güner; Christopher S. Ruf; Jeffrey R. Piepmeier; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2009)

Deriving soil moisture with the combined L-band radar and radiometer measurements. - Jiancheng Shi 001; Kun-Shan Chen; Leung Tsang; Thomas J. Jackson; Eni G. Njoku; Jakob J. van Zyl; Peggy O'Neill; Dara Entekhabi; Joel T. Johnson; Mahta Moghaddam (IGARSS, 2010)

The Soil Moisture Active Passive (SMAP) Mission. - Dara Entekhabi; Eni G. Njoku; Peggy O'Neill; Kent H. Kellogg; Wade T. Crow; Wendy N. Edelstein; Jared Entin; Shawn D. Goodman; Thomas J. Jackson; Joel T. Johnson; John S. Kimball; Jeffrey R. Piepmeier; et al. (Proc. IEEE, 2010)

Including Spatial Correlations in the Statistical MIMO Radar Target Model. - Mark Frankford; Joel T. Johnson; Emre Ertin (IEEE Signal Process. Lett., 2010)

Compensation of Faraday Rotation in Multipolarization Scatterometry. - Mark Frankford; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2010)

Performance Study of a Cross-Frequency Detection Algorithm for Pulsed Sinusoidal RFI in Microwave Radiometry. - Baris Guner; Noppasin Niamsuwan; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2010)

A Monte Carlo Study of Altimeter Pulse Returns and the Electromagnetic Bias. - Praphun Naenna; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2010)

MIMO radar target measurements. - Kyle B. Stewart; Mark Frankford; Joel T. Johnson; Emre Ertin (ACSCC, 2011)

A study of sea surface height retrieval using Doppler measurements from numerically simulated low grazing angle backscatter data. - Chun-Sik Chae; Joel T. Johnson (IGARSS, 2011)

Studies of radio frequency interference in SMOS observations. - Joel T. Johnson; Mustafa Aksoy (IGARSS, 2011)

Soil moisture retrieval over low-vegetation surfaces using time-series radar observations and a lookup table representation of forward scattering. - Seung-Bum Kim; Shaowu Huang; Leung Tsang; Joel T. Johnson; Eni G. Njoku (IGARSS, 2011)

Radio frequency interference mitigation for the planned SMAP radar and radiometer. - Michael W. Spencer; Samuel F. Chan; Eric Belz; Jeffrey Piepmeier; Priscilla N. Mohammed; Edward Kim 001; Joel T. Johnson (IGARSS, 2011)

A Study of Interferometric Phase Statistics and Accuracy for Sea Surface Height Retrievals from Numerically Simulated Low-Grazing-Angle Backscatter Data. - Chun-Sik Chae; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2011)

Airborne L-Band Radio Frequency Interference Observations From the SMAPVEX08 Campaign and Associated Flights. - James Park 001; Joel T. Johnson; Ninoslav Majurec; Noppasin Niamsuwan; Jeffrey R. Piepmeier; Priscilla N. Mohammed; Christopher S. Ruf; Sidharth Misra; Simon Yueh; Steve J. Dinardo (IEEE Trans. Geosci. Remote. Sens., 2011)

An experimental and theoretical study on the sensitivity of cross-polarized backscatter to soil moisture. - Anna Balenzano; Francesco Mattia; Giuseppe Satalino; Jeffrey Ouellette; Joel T. Johnson (IGARSS, 2012)

Assessment of the impacts of radio frequency interference on SMAP radar and radiometer measurements. - Curtis W. Chen; Jeffrey R. Piepmeier; Joel T. Johnson; Hirad Ghaemi (IGARSS, 2012)

A Study of the Fourth-Order Small Perturbation Method for Scattering From Two-Layer Rough Surfaces. - Metin A. Demir; Joel T. Johnson; Tom J. Zajdel (IEEE Trans. Geosci. Remote. Sens., 2012)

Soil Moisture Retrieval Using Time-Series Radar Observations Over Bare Surfaces. - Seung-Bum Kim; Leung Tsang; Joel T. Johnson; Shaowu Huang; Jakob J. van Zyl; Eni G. Njoku (IEEE Trans. Geosci. Remote. Sens., 2012)

SMAP RFI mitigation algorithm performance characterization using airborne high-rate direct-sampled SMAPVEX 2012 data. - Sidharth Misra; Joel T. Johnson; Mustafa Aksoy; Jinzheng Peng; Damon Bradley; Ian O'Dwyer; Sharmila Padmanabhan; Douglas E. Dawson; Seth L. Chazanoff; Barron Latham; Todd Gaier; Caroline Flores-Helizon; et al. (IGARSS, 2013)

A Study of SMOS RFI Over North America. - Mustafa Aksoy; Joel T. Johnson (IEEE Geosci. Remote. Sens. Lett., 2013)

A Study of Sea Surface Wind Vector Estimation From Near-Nadiral Cross-Track-Scanned Backscatter Data. - Alexey Nekrasov 002; Jeffrey Ouellette; Ninoslav Majurec; Joel T. Johnson (IEEE Geosci. Remote. Sens. Lett., 2013)

A Comparative Analysis of Low-Level Radio Frequency Interference in SMOS and Aquarius Microwave Radiometer Measurements. - Mustafa Aksoy; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2013)

A Study of Sea Surface Range-Resolved Doppler Spectra Using Numerically Simulated Low-Grazing-Angle Backscatter Data. - Chun-Sik Chae; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2013)

An examination of multi-frequency microwave radiomtry for probing subsurface ice sheet temperature. - Mustafa Aksoy; Joel T. Johnson; Kenneth C. Jezek; Mchael Durad; Mark R. Drinkwater; Govanni Macellonf; Leung Tsang (IGARSS, 2014)

Radio frequency interference observations using an L-Band direct sampling receiver during the SMAPVEX12 airborne campaign. - Mustafa Aksoy; Joel T. Johnson; Sidharth Misra (IGARSS, 2014)

Understanding SMOS data in Antarctica. - Giovanni Macelloni; Marco Brogioni; Mustafa Aksoy; Joel T. Johnson; Kenneth C. Jezek; Mark Drinkwater (IGARSS, 2014)

Numerical and experimental studies of target detection with MIMO radar. - Mark T. Frankford; Kyle B. Stewart; Ninoslav Majurec; Joel T. Johnson (IEEE Trans. Aerosp. Electron. Syst., 2014)

Simulation and analysis of polarimetric radar signatures of human gaits. - James Park 001; Joel T. Johnson; Ninoslav Majurec; Mark Frankford; Kyle B. Stewart; Graeme E. Smith; Lamar Westbrook (IEEE Trans. Aerosp. Electron. Syst., 2014)

Tests of the SMAP Combined Radar and Radiometer Algorithm Using Airborne Field Campaign Observations and Simulated Data. - Narendra Narayan Das; Dara Entekhabi; Eni G. Njoku; Jiancheng Shi 001; Joel T. Johnson; Andreas Colliander (IEEE Trans. Geosci. Remote. Sens., 2014)

Polarization Features in Bistatic Scattering From Rough Surfaces. - Joel T. Johnson; Jeffrey Ouellette (IEEE Trans. Geosci. Remote. Sens., 2014)

Comparison of Model Predictions With Measurements of Ku- and Ka-Band Near-Nadir Normalized Radar Cross Sections of the Sea Surface From the Genesis and Rapid Intensification Processes Experiment. - Ninoslav Majurec; Joel T. Johnson; Simone Tanelli; Stephen L. Durden (IEEE Trans. Geosci. Remote. Sens., 2014)

A Simulation Study of Compact Polarimetry for Radar Retrieval of Soil Moisture. - Jeffrey Ouellette; Joel T. Johnson; Seung-Bum Kim; Jakob J. van Zyl; Mahta Moghaddam; Michael W. Spencer; Leung Tsang; Dara Entekhabi (IEEE Trans. Geosci. Remote. Sens., 2014)

Radio-Frequency Interference Mitigation for the Soil Moisture Active Passive Microwave Radiometer. - Jeffrey R. Piepmeier; Joel T. Johnson; Priscilla N. Mohammed; Damon Bradley; Christopher Ruf; Mustafa Aksoy; Rafael García; Derek Hudson; Lynn Miles; Mark Englin Wong (IEEE Trans. Geosci. Remote. Sens., 2014)

Experiments with cognitive radar. - Graeme E. Smith; Zach Cammenga; Adam E. Mitchell; Kristine L. Bell; Murali Rangaswamy; Joel T. Johnson; Christopher J. Baker (CAMSAP, 2015)

Bistatic coherent MIMO clutter rank analysis. - Kristine L. Bell; Joel T. Johnson; Christopher Baker; Graeme E. Smith; Muralidhar Rangaswamy (EUSIPCO, 2015)

Real-time estimation of ocean wave fields from marine radar data. - David R. Lyzenga; Okey G. Nwogu; Robert F. Beck; Andrew O'Brien 001; Joel T. Johnson; Tony de Paolo; Eric Terrill (IGARSS, 2015)

A multistatic radar approach to soil moisture and vegetation monitoring at L band. - Nazzareno Pierdicca; Marco Brogioni; Leila Guerriero; Simonetta Paloscia; Nicolas Floury; Joel T. Johnson; Jeffrey D. Ouellette; Caglar Yardim (IGARSS, 2015)

An intercomparison of models for predicting bistatic scattering from rough surfaces. - Caglar Yardim; Joel T. Johnson; Robert J. Burkholder; Fernando L. Teixeira; Jeffrey Ouellette; Kun-Shan Chen; Marco Brogioni; Nazzareno Pierdicca (IGARSS, 2015)

Cognitive Radar Framework for Target Detection and Tracking. - Kristine L. Bell; Christopher J. Baker; Graeme E. Smith; Joel T. Johnson; Muralidhar Rangaswamy (IEEE J. Sel. Top. Signal Process., 2015)

Physical Models of Layered Polar Firn Brightness Temperatures From 0.5 to 2 GHz. - Shurun Tan; Mustafa Aksoy; Marco Brogioni; Giovanni Macelloni; Michael Durand; Kenneth C. Jezek; Tian-Lin Wang; Leung Tsang; Joel T. Johnson; Mark R. Drinkwater; Ludovic Brucker (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2015)

A Simplified Formulation for Rough Surface Cross-Polarized Backscattering Under the Second-Order Small-Slope Approximation. - Charles-Antoine Guérin; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2015)

Radiometric Approach for Estimating Relative Changes in Intraglacier Average Temperature. - Kenneth C. Jezek; Joel T. Johnson; Mark Drinkwater; Giovanni Macelloni; Leung Tsang; Mustafa Aksoy; Michael Durand (IEEE Trans. Geosci. Remote. Sens., 2015)

Testing the feasibility of a bayesian retrieval of greenland ice sheet internal temperature from ultra-wideband software-defined microwave radiometer (UWBRAD) measurements. - Yuna Duan; Michael Durand; Kenneth C. Jezek; Caglar Yardim; Alexandra Bringer; Mustafa Aksoy; Joel T. Johnson (IGARSS, 2016)

The CubeSat Radiometer Radio Frequency Interference Technology Validation (CubeRRT) mission. - Joel T. Johnson; Chi-Chih Chen; Andrew O'Brien 001; Graeme E. Smith; Christa McKelvey; Mark J. Andrews; Christopher D. Ball; Sidharth Misra; Shannon T. Brown; Jonathan Kocz; Robert Jarnot; Damon C. Bradley; et al. (IGARSS, 2016)

The Ultra-wideband Software-Defined Radiometer (UWBRAD) for ice sheet internal temperature sensing: Results from recent observations. - Joel T. Johnson; Kenneth C. Jezek; Mustafa Aksoy; Alexandra Bringer; Caglar Yardim; Mark J. Andrews; Chi-Chih Chen; Domenic Belgiovane; Vladimir Ye. Leuski; Michael Durand; Yuna Duan; Giovanni Macelloni; et al. (IGARSS, 2016)

Soil Moisture Active Passive (SMAP) microwave radiometer radio-frequency interference (RFI) mitigation: Algorithm updates and performance assessment. - Joel T. Johnson; Priscilla N. Mohammed; Jeffrey R. Piepmeier; Alexandra Bringer; Mustafa Aksoy (IGARSS, 2016)

Surface soil moisture retrieval using L-band SMAP SAR data and its validation. - Seung-Bum Kim; Jakob J. van Zyl; Joel T. Johnson; Mahta Moghaddam; Leung Tsang; Andreas Colliander; Roy Scott Dunbar; Thomas J. Jackson; Sermsak Jaruwatanadilok; Richard D. West; Aaron A. Berg; Todd Caldwell; et al. (IGARSS, 2016)

Modeling polarimetric sea surface specular scattering for GNSS-R applications. - Jeonghwan Park 001; Joel T. Johnson; Jeffrey Ouellette (IGARSS, 2016)

Studies of TDS-1 GNSS-R ocean altimetry using a "full DDM" retrieval approach. - Jeonghwan Park 001; Joel T. Johnson; Andrew O'Brien 001; Stephen T. Lowe (IGARSS, 2016)

A partially coherent microwave emission model for polar ice sheets with density fluctuations and multilayer rough interfaces from 0.5 to 2 GHZ. - Leung Tsang; Tian-Lin Wang; Joel T. Johnson; Kenneth C. Jezek; Shurun Tan (IGARSS, 2016)

L-Band Radio-Frequency Interference Observations During the SMAP Validation Experiment 2012. - Mustafa Aksoy; Joel T. Johnson; Sidharth Misra; Andreas Colliander; Ian O'Dwyer (IEEE Trans. Geosci. Remote. Sens., 2016)

Detection of Inland Open Water Surfaces Using Dual Polarization L-Band Radar for the Soil Moisture Active Passive Mission. - Seung-Bum Kim; Jeffrey D. Ouellette; Jakob J. van Zyl; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2016)

SMAP L-Band Microwave Radiometer: RFI Mitigation Prelaunch Analysis and First Year On-Orbit Observations. - Priscilla N. Mohammed; Mustafa Aksoy; Jeffrey R. Piepmeier; Joel T. Johnson; Alexandra Bringer (IEEE Trans. Geosci. Remote. Sens., 2016)

The ultra-wideband software defined microwave radiometer (UWBRAD) for ice sheet subsurface temperature sensing: RFI algorithms and performance. - Mark J. Andrews; Hongkun Li; Joel T. Johnson; Alexandra Bringer (IGARSS, 2017)

The Ultra-Wideband Software Defined Microwave Radiometer (UWBRAD) for Ice sheet subsurface temperature sensing: Calibration and campaign results. - Mark J. Andrews; Hongkun Li; Joel T. Johnson; Kenneth C. Jezek; Alexandra Bringer; Caglar Yardim; Chi-Chih Chen; Domenic Belgiovane; Vladimir Ye. Leuski; Michael Durand; Yuna Duan; Giovanni Macelloni; et al. (IGARSS, 2017)

Development of the cubesat radiometer radio frequency interference technology validation (cuberrt) system. - Christopher D. Ball; Chi-Chih Chen; Andrew O'Brien 001; Graeme E. Smith; Christa McKelvey; Mark J. Andrews; Joseph Landon Garry; Joel T. Johnson; Sidharth Misra; Shannon T. Brown; Robert Jarnot; Jonathan Kocz; et al. (IGARSS, 2017)

Performance of SMAP radiometer RFI detection algorithms and analysis of residual RFI sources. - Alexandra Bringer; Joel T. Johnson; Priscilla N. Mohammed; Jeffrey R. Piepmeier (IGARSS, 2017)

Calibration and validation of the cygnss level 1 data products. - Scott Gleason 001; Christopher Ruf; Maria Paola Clarizia; Joel T. Johnson; Andrew O'Brien 001; Paul S. Chang; Zorana Jelenak; Faozi Said; Seubson Soisuvarn (IGARSS, 2017)

Preliminary study for a spaceborne ultrawideband microwave radiometer for the monitoring of cryosphere elements: The cryorad project. - Giovanni Macelloni; Marco Brogioni; Francesco Montomoli; Marion Leduc-Leballeur; Giacomo De Carolis; Lars Kaleschke; Joel T. Johnson; Kenneth C. Jezek (IGARSS, 2017)

Sentinel-1 high resolution soil moisture. - Francesco Mattia; Anna Balenzano; Giuseppe Satalino; Francesco P. Lovergine; Alexander Loew; Jian Peng 006; Urs Wegmüller; Maurizio Santoro; Oliver Cartus; Katarzyna Dabrowska-Zielinska; Jan Pawel Musial; Malcolm W. J. Davidson; et al. (IGARSS, 2017)

The CubeSat Radiometer Radio Frequency Interference Technology (CubeRRT) validation mission: Performance and development of the Digital Backend technology. - Sidharth Misra; Jonathan Kocz; Carl Felten; Robert Jarnot; Rudi Bendig; Shannon T. Brown; Joel T. Johnson (IGARSS, 2017)

Comparing the cygnss simulator forward scattering model with TDS-1 and cygnss on-orbit DDMS. - Andrew O'Brien 001; Joel T. Johnson (IGARSS, 2017)

A study of wind direction effects on GNSS-R delay Doppler maps near the specular point. - Jeonghwan Park 001; Joel T. Johnson (IGARSS, 2017)

Investigating "rapid revisit" observations of cygnss. - Jeonghwan Park 001; Joel T. Johnson; Andrew O'Brien 001; Yuchan Yi (IGARSS, 2017)

A partial coherent model of brightness temperatures of polar ICE sheets at l band incorporating multi-layer roughness effects based on SPM2 theory. - Mohammadreza Sanamzadeh; Leung Tsang; Joel T. Johnson (IGARSS, 2017)

Microwave Thermal Emission Characteristics of a Two-Layer Medium With Rough Interfaces Using the Second-Order Small Perturbation Method. - Robert J. Burkholder; Joel T. Johnson; Mohammadreza Sanamzadeh; Leung Tsang; Shurun Tan (IEEE Geosci. Remote. Sens. Lett., 2017)

A Study of Wind Direction Effects on Sea Surface Specular Scattering for GNSS-R Applications. - Jeonghwan Park 001; Joel T. Johnson (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2017)

Surface Soil Moisture Retrieval Using the L-Band Synthetic Aperture Radar Onboard the Soil Moisture Active-Passive Satellite and Evaluation at Core Validation Sites. - Seung-Bum Kim; Jakob J. van Zyl; Joel T. Johnson; Mahta Moghaddam; Leung Tsang; Andreas Colliander; Roy Scott Dunbar; Thomas J. Jackson; Sermsak Jaruwatanadilok; Richard D. West; Aaron Berg; Todd Caldwell; et al. (IEEE Trans. Geosci. Remote. Sens., 2017)

On the Amplitude Distributions of Bistatic Scattered Fields From Rough Surfaces. - Hongkun Li; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2017)

A Time-Series Approach to Estimating Soil Moisture From Vegetated Surfaces Using L-Band Radar Backscatter. - Jeffrey D. Ouellette; Joel T. Johnson; Anna Balenzano; Francesco Mattia; Giuseppe Satalino; Seung-Bum Kim; Roy Scott Dunbar; Andreas Colliander; Michael H. Cosh; Todd G. Caldwell; Jeffrey P. Walker; Aaron A. Berg (IEEE Trans. Geosci. Remote. Sens., 2017)

GNSS-R Time-Series Soil Moisture Retrievals from Vegetated Surfaces. - Muhammad A. Al-Khaldi; Joel T. Johnson; Andrew O'Brien 001; Francesco Mattia; Anna Balenzano (IGARSS, 2018)

An Analysis of Bistatic Sea Clutter Statistics. - Ahmed M. Balakhder; Joel T. Johnson; Hongkun Li (IGARSS, 2018)

Cross-Comparison of Three SAR Soil Moisture Retrieval Algorithms Using Synthetic and Experimental Data. - Anna Balenzano; Giuseppe Satalino; Francesco P. Lovergine; Francesco Mattia; Oliver Cartus; Malcolm W. J. Davidson; Muhammad A. Al-Khaldi; Joel T. Johnson (IGARSS, 2018)

SMAP Mission: Changes in the RFI Environment. - Alexandra Bringer; Matthew Daehn; Joel T. Johnson; Yan Soldo; David M. Le Vine; Paolo de Matthaeis; Jeffrey R. Piepmeier; Priscilla N. Mohammed (IGARSS, 2018)

Investigation of Spaceborne Polarimetric GNSS-R Over Land Using the Smap Radar Receiver. - Matthew Buchanan; Andrew O'Brien 001; Joel T. Johnson (IGARSS, 2018)

Using 0.5-2 ghz Microwave Radiometry to Derive Ocean Salinity. - Oguz Demir; Alexandra Bringer; Joel T. Johnson; Mark J. Andrews; Ethan Raines; Kenneth C. Jezek; Giovanni Macelloni; Marco Brogioni (IGARSS, 2018)

Measurements of 0.5-2 GHz Thermal Emission Spectra from the Greenland Ice Sheet, Sea Ice, and Permafrost: Results from September 2017 Campaign. - Joel T. Johnson; Kenneth C. Jezek; Mark J. Andrews; Hongkun Li; Alexandra Bringer; Caglar Yardim; Domenic Belgiovane; Julie Z. Miller; Michael Durand; Yuna Duan; Giovanni Macelloni; Marco Brogioni; et al. (IGARSS, 2018)

Cryorad: A Low Frequency Wideband Radiometer Mission for the Study of the Cryosphere. - Giovanni Macelloni; Marco Brogioni; Marion Leduc-Leballeur; Francesco Montomoli; Annett Bartsch; Arnaud Mialon; Catherine Ritz; Josep Closa Soteras; Detlef Stammer; Ghislain Picard; Giacomo De Carolis; Jacqueline Boutin; et al. (IGARSS, 2018)

Sentinel-1 & Sentinel-2 for SOIL Moisture Retrieval at Field Scale. - Francesco Mattia; Anna Balenzano; Giuseppe Satalino; Francesco P. Lovergine; Jian Peng 006; Urs Wegmüller; Oliver Cartus; Malcolm W. J. Davidson; Seung-Bum Kim; Joel T. Johnson; Jeffrey P. Walker; Xiaoling Wu 001; et al. (IGARSS, 2018)

Testing and Operation Planning of the Cubesat Radiometer Radio Frequency Interference Technology Validation (Cuberrt) System. - Christa McKelvey; Christopher D. Ball; Chi-Chih Chen; Andrew O'Brien 001; Graeme E. Smith; Mark J. Andrews; Joseph Landon Garry; Joel T. Johnson; Sidharth Misra; Shannon T. Brown; Robert Jarnot; Rudi Bendig; et al. (IGARSS, 2018)

CubeSat Radiometer Radio Frequency Interference Technology (CubeRRT) Validation Mission: Enabling Future Resource-Constrained Science Missions. - Sidharth Misra; Shannon T. Brown; Robert Jarnot; Carl Felten; Rudi Bendig; Jonathan Kocz; Christa McKelvey; Christopher D. Ball; Chi-Chih Chen; Andrew O'Brien 001; Graeme E. Smith; Mark J. Andrews; et al. (IGARSS, 2018)

Fully Adaptive Remote Sensing Observing System Simulation Experiments. - Graeme E. Smith; Adam E. Mitchell; Christopher D. Ball; Andrew O'Brien 001; Joel T. Johnson (IGARSS, 2018)

Recent Advances in Smap RFI Processing. - Yan Soldo; David M. Le Vine; Alexandra Bringer; Priscilla N. Mohammed; Paolo de Matthaeis; Jeffrey R. Piepmeier; Joel T. Johnson (IGARSS, 2018)

Modeling of Sea State Conditions for Improvement of Cygnss L2 Wind Speed Retrievals. - Tianlin Wang; Valery U. Zavorotny; Joel T. Johnson; Christopher Ruf; Yuchan Yi (IGARSS, 2018)

A Study of Cross-Polarized Sea Clutter Using the SSA2 High Frequency Approximation and the Two-Scale Model. - Shanka N. Wijesundara; Joel T. Johnson (IGARSS, 2018)

Foreword to the Special Issue on the 2017 IEEE International Geoscience and Remote Sensing Symposium. - Saibun Tjuatja; David Kunkee; Joel T. Johnson; Kun-Shan Chen (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2018)

The Ultrawideband Software-Defined Microwave Radiometer: Instrument Description and Initial Campaign Results. - Mark J. Andrews; Joel T. Johnson; Kenneth C. Jezek; Hongkun Li; Alexandra Bringer; Chi-Chih Chen; Domenic Belgiovane; Vladimir Ye. Leuski; Giovanni Macelloni; Marco Brogioni (IEEE Trans. Geosci. Remote. Sens., 2018)

500-2000-MHz Brightness Temperature Spectra of the Northwestern Greenland Ice Sheet. - Kenneth C. Jezek; Joel T. Johnson; Shurun Tan; Leung Tsang; Mark J. Andrews; Marco Brogioni; Giovanni Macelloni; Michael Durand; Chi-Chih Chen; Domenic Belgiovane; Yuna Duan; Caglar Yardim; et al. (IEEE Trans. Geosci. Remote. Sens., 2018)

Location of Radio-Frequency Interference Sources Using the SMAP L-Band Radiometer. - Yan Soldo; David M. Le Vine; Alexandra Bringer; Paolo de Matthaeis; Roger Oliva; Joel T. Johnson; Jeffrey R. Piepmeier (IEEE Trans. Geosci. Remote. Sens., 2018)

Fully Adaptive Cloud Profiling Radar Simulation. - Jakob DeLong; Mohammad Abu Shattal; Andrew O'Brien 001; Christopher D. Ball; Joel T. Johnson; Graeme E. Smith (IGARSS, 2019)

Open Source Software for Simulating Collaborative Networks of Autonomous Adaptive Sensors. - Ryan Linnabary; Andrew O'Brien 001; Graeme E. Smith; Christopher D. Ball; Joel T. Johnson (IGARSS, 2019)

Above Snow Vegetation Effects on Wideband Autocorrelation Radiometry. - Shurun Tan; Maryam Salim; Leung Tsang; Joel T. Johnson; Roger D. De Roo (IGARSS, 2019)

Integration of Cygnss Wind and Wave Observations with the Wavewatch III Numerical Model. - Tianlin Wang; Valery U. Zavorotny; Joel T. Johnson; Yuchan Yi; Christopher Ruf (IGARSS, 2019)

Swell Effects on Near-Coastal Smap L-Band High-Resolution NRCS Data. - Shanka N. Wijesundara; Joel T. Johnson (IGARSS, 2019)

On the Estimation of Wind Speed Diurnal Cycles Using Simulated Measurements of CYGNSS and ASCAT. - Yuchan Yi; Joel T. Johnson; Xiaochun Wang (IEEE Geosci. Remote. Sens. Lett., 2019)

Using "Rapid Revisit" CYGNSS Wind Speed Measurements to Detect Convective Activity. - Jeonghwan Park 001; Joel T. Johnson; Yuchan Yi; Andrew J. O'Brien 001 (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2019)

Comparison of Maximum-Likelihood Estimation and Other Methods for Clutter Doppler Centroid Estimation. - Shanka N. Wijesundara; Kristine L. Bell; Graeme E. Smith; Andrew O'Brien 001; Joel T. Johnson (IEEE Trans. Aerosp. Electron. Syst., 2019)

Time-Series Retrieval of Soil Moisture Using CYGNSS. - Mohammad M. Al-Khaldi; Joel T. Johnson; Andrew J. O'Brien 001; Anna Balenzano; Francesco Mattia (IEEE Trans. Geosci. Remote. Sens., 2019)

On the Coherency of Ocean and Land Surface Specular Scattering for GNSS-R and Signals of Opportunity Systems. - Ahmed M. Balakhder; Mohammad M. Al-Khaldi; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2019)

Remote Sensing of Sea Ice Thickness and Salinity With 0.5-2 GHz Microwave Radiometry. - Kenneth C. Jezek; Ronald Kwok; Lars Kaleschke; Domenic Belgiovane; Chi-Chih Chen; Alexandra Bringer; Joel T. Johnson; Oguz Demir; Mark J. Andrews; Giovanni Macelloni; Marco Brogioni; Marion Leduc-Leballeur; et al. (IEEE Trans. Geosci. Remote. Sens., 2019)

Development of an On-Board Wide-Band Processor for Radio Frequency Interference Detection and Filtering. - Sidharth Misra; Jonathon Kocz; Robert Jarnot; Shannon T. Brown; Rudi Bendig; Carl Felten; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2019)

P-Band Radiometry: RFI and Calibration for Uwbrad. - Mark J. Andrews; Joel T. Johnson; Kenneth C. Jezek; Alexandra Bringer; Marco Brogioni; Giovanni Macelloni; Marion Leduc-Leballeur (IGARSS, 2020)

Monitoring Rapid Change in the Atmosphere Using Cygnss Wind Speed Measurements. - Alexandra Bringer; Mohammad M. Al-Khaldi; Joel T. Johnson; Jeonghwan Park 001 (IGARSS, 2020)

Predicting Soil Moisture Retrieval Performance for the NISAR Mission. - Alexandra Bringer; Joel T. Johnson; Rajat Bindlish (IGARSS, 2020)

The GRSS Standard for GNSS-Reflectometry. - Hugo Carreno-Luengo; Adriano Camps; Nicolas Flouri; Manuel Martín-Neira; Chris Ruf; Tianlin Wang; Siri Jodha S. Khalsa; Maria Paola Clarizia; Jennifer Reynolds; Joel T. Johnson; Andrew O'Brien 001; Carmela Galdi; et al. (IGARSS, 2020)

An Algorithm for Adaptive Determination of Radar Coherent Integration Time. - Jakob DeLong; Joel T. Johnson (IGARSS, 2020)

Ultra Wideband Radiometer Signatures of Arctic Sea Ice: Preliminary Results from the Mosaic Campaign. - Oguz Demir; Mark J. Andrews; Kenneth Ayotte; Lars Kaleschke; Kenneth C. Jezek; Joel T. Johnson (IGARSS, 2020)

Melt Detection Over Greenland Using Smap Radiometer Observations. - Seyedmohammad Mousavi; Andreas Colliander; Julie Z. Miller; Dara Entekhabi; Joel T. Johnson; Christopher A. Shuman; John S. Kimball; Zoe R. Courville (IGARSS, 2020)

Characterizing the Coherent Reflected Power Dependence on Rough Surface Height at Low Signal Levels. - Ethan Raines; Joel T. Johnson; Robert J. Burkholder (IGARSS, 2020)

Improvement of CYGNSS Level 1 Calibration Using Modeling and Measurements of Ocean Surface Mean Square Slope. - Tianlin Wang; Valery U. Zavorotny; Joel T. Johnson; Yuchan Yi; Christopher Ruf; Scott Gleason 001; Darren McKague; Paul A. Hwang; Erick Rogers; Shuyi Chen; Yulin Pan; Thomas Bakker (IGARSS, 2020)

itmlogic: The Irregular Terrain Model by Longley and Rice. - Edward J. Oughton; Tom Russell; Joel T. Johnson; Caglar Yardim; Julius Kusuma (J. Open Source Softw., 2020)

Characterizing Background Signals and Noise in Spaceborne GNSS Reflection Ocean Observations. - Scott Gleason 001; Joel T. Johnson; Chris Ruf; Charles Bussy-Virat (IEEE Geosci. Remote. Sens. Lett., 2020)

Geolocation, Calibration and Surface Resolution of CYGNSS GNSS-R Land Observations. - Scott Gleason 001; Andrew O'Brien 001; Anthony Russel; Mohammad M. Al-Khaldi; Joel T. Johnson (Remote. Sens., 2020)

Track-Based Cyclone Maximum Wind Retrievals Using the Cyclone Global Navigation Satellite System (CYGNSS) Mission Full DDMs. - Mohammad M. Al-Khaldi; Joel T. Johnson; Younghun Kang; Stephen J. Katzberg; Alexandra Bringer; Ethan J. Kubatko; Dylan Wood (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2020)

Real-Time Detection and Filtering of Radio Frequency Interference Onboard a Spaceborne Microwave Radiometer: The CubeRRT Mission. - Joel T. Johnson; Christopher D. Ball; Chi-Chih Chen; Christa McKelvey; Graeme E. Smith; Mark J. Andrews; Andrew O'Brien 001; Joseph Landon Garry; Sidharth Misra; Rudi Bendig; Carl Felten; Shannon T. Brown; et al. (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2020)

A Study of Front End Architectures for the PolarRad 0.5-2 GHZ Microwave Radiometer. - Mark J. Andrews; Joel T. Johnson; Matthew McLinden; Sidharth Misra (IGARSS, 2021)

Analyzing the Radio Frequency Interference Environment at Cal/Val Site Locations for the Soil Moisture Active/Passive (SMAP) Mission. - Alexandra Bringer; Andreas Colliander; Joel T. Johnson; Simon Yueh; Siharth Misra (IGARSS, 2021)

Studies of Terrain Surface Roughness and its Effect on GNSS-R Systems Using Airborne Lidar Measurements. - Alexandra Bringer; Joel T. Johnson; Charles K. Toth; Christopher S. Ruf; Mahta Moghaddam (IGARSS, 2021)

Measuring Englacial Temperatures with a Combined Radar-Radiometer. - Anna L. Broome; Dustin M. Schroeder; Joel T. Johnson (IGARSS, 2021)

Intercomparison of Models for CYGNSS Delay-Doppler Maps at a Validation Site in the San Luis Valley of Colorado. - James D. Campbell; Ruzbeh Akbar; Amir Azemati; Alexandra Bringer; Davide Comite; Laura Dente; Scott T. Gleason; Leila Guerriero; Erik Hodges; Joel T. Johnson; Seung-Bum Kim; Amer Melebari; et al. (IGARSS, 2021)

Studies of the Retrieval of Sea Ice Thickness and Salinity with Wideband Microwave Radiometry. - Oguz Demir; Kenneth C. Jezek; Marco Brogioni; Giovanni Macelloni; Lars Kaleschke; Joel T. Johnson (IGARSS, 2021)

Time-Series Soil Moisture Retrieval Using S-Band Backscatter Measurements from the SMEX02 Campaign. - Dustin Horton; Alexandra Bringer; Joel T. Johnson; Jeonghwan Park 001; Rajat Bindlish (IGARSS, 2021)

Soil Moisture Retrieval using a Time-Series Ratio Algorithm for the Nisar Mission. - Jeonghwan Park 001; Rajat Bindlish; Alexandra Bringer; Dustin Horton; Joel T. Johnson (IGARSS, 2021)

Snowpack Remote Sensing using Wideband Long-Wavelength Microwave Radiometry. - Maryam Salim; Roger D. De Roo; Mark J. Andrews; Joel T. Johnson; Alexandra Bringer; Kamal Sarabandi (IGARSS, 2021)

Limits on Antarctic Ice Sheet Temperature Estimation using 0.5-2 GHz Ultra-Wideband Radiometry. - Caglar Yardim; Mark J. Andrews; Joel T. Johnson; Kenneth C. Jezek; Marion Leduc-Leballeur; Marco Brogioni; Giovanni Macelloni (IGARSS, 2021)

The IEEE-SA Working Group on Spaceborne GNSS-R: Scene Study. - Hugo Carreno-Luengo; Adriano Camps; Chris Ruf; Nicolas Floury; Manuel Martín-Neira; Tianlin Wang; Siri Jodha S. Khalsa; Maria Paola Clarizia; Jennifer Reynolds; Joel T. Johnson; Andrew O'Brien 001; Carmela Galdi; et al. (IEEE Access, 2021)

Studies of a Rapid Change Detector Using CYGNSS Level-2 Wind Speed Products. - Mohammad M. Al-Khaldi; Alexandra Bringer; Joel T. Johnson (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2021)

Matched Filter Cyclone Maximum Wind Retrievals Using CYGNSS: Progress Update and Error Analysis. - Mohammad M. Al-Khaldi; Stephen J. Katzberg; Joel T. Johnson; Younghun Kang; Ethan J. Kubatko; Scott Gleason 001 (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2021)

Mapping the Dynamics of the South Asian Monsoon Using CYGNSS's Level-1 Signal Coherency. - Mohammad M. Al-Khaldi; Rashmi Shah; Clara C. Chew; Joel T. Johnson; Scott Gleason 001 (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2021)

Properties of the RFI Environment at 1400-1427 MHz as Observed by the Soil Moisture Active/Passive Mission Microwave Radiometer. - Alexandra Bringer; Joel T. Johnson; Yan Soldo; David M. Le Vine; Priscilla N. Mohammed; Sidharth Misra; Paolo de Matthaeis; Jeffrey R. Piepmeier (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2021)

Microwave Radiometry at Frequencies From 500 to 1400 MHz: An Emerging Technology for Earth Observations. - Joel T. Johnson; Kenneth C. Jezek; Giovanni Macelloni; Marco Brogioni; Leung Tsang; Emmanuel P. Dinnat; Jeffrey P. Walker; Nan Ye; Sidharth Misra; Jeffrey R. Piepmeier; Rajat Bindlish; David M. Le Vine; et al. (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2021)

Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP L-Band Microwave Radiometry. - Mohammad Mousavi; Andreas Colliander; Julie Z. Miller; Dara Entekhabi; Joel T. Johnson; Christopher A. Shuman; John S. Kimball; Zoe R. Courville (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2021)

Inland Water Body Mapping Using CYGNSS Coherence Detection. - Mohammad M. Al-Khaldi; Joel T. Johnson; Scott Gleason 001; Clara C. Chew; Cynthia Gerlein-Safdi; Rashmi Shah; Cinzia Zuffada (IEEE Trans. Geosci. Remote. Sens., 2021)

An Algorithm for Detecting Coherence in Cyclone Global Navigation Satellite System Mission Level-1 Delay-Doppler Maps. - Mohammad M. Al-Khaldi; Joel T. Johnson; Scott Gleason 001; Eric Loria; Andrew J. O'Brien 001; Yuchan Yi (IEEE Trans. Geosci. Remote. Sens., 2021)

Electromagnetic Scattering and Emission From Large Rough Surfaces With Multiple Elevations Using the MLSD-SMCG Method. - Yanlei Du; Jian Yang 011; Xiaofeng Yang 002; Leung Tsang; Kun-Shan Chen; Joel T. Johnson; Junjun Yin 001 (IEEE Trans. Geosci. Remote. Sens., 2021)

A Partially Coherent Approach for Modeling Polar Ice Sheet 0.5-2-GHz Thermal Emission. - Shurun Tan; Leung Tsang; Haokui Xu; Joel T. Johnson; Kenneth C. Jezek; Caglar Yardim; Michael Durand; Yuna Duan (IEEE Trans. Geosci. Remote. Sens., 2021)

Towards a Unified Framework for Scattering Models at Microwave and Optical Wavelengths: The Bispinorial Description of Polarization States. - Ismail Baris; Thomas Jagdhuber; Harald Anglberger; Andrey Osipov; François Jonard; Joel T. Johnson; Thomas Eibert (IGARSS, 2022)

Monitoring The L-Band RFI Environment: Tracking RFI Sources Observed by Smap. - Alexandra Bringer; Joel T. Johnson; Priscilla N. Mohammed; Sidharth Misra; David M. Le Vine (IGARSS, 2022)

Modeling the Errors of a Time Series Algorithm for Retrieving Soil Moisture in the NISAR Mission. - Alexandra Bringer; Joel T. Johnson; Jeonghwan Park 001; Rajat Bindlish; Dustin Horton (IGARSS, 2022)

Analysis of LIDAR Digital Elevation Models to Support CYGNSS CAL/VAL Activities. - Alexandra Bringer; Tianlin Wang; Joel T. Johnson (IGARSS, 2022)

Quantifying the Complimentary Sensitivities of Active and Passive Microwave Measurements to Ice-Sheet Thermal Signatures. - Anna L. Broome; Dustin M. Schroeder; Joel T. Johnson (IGARSS, 2022)

Ice Sheet Melt Water Profile Mapping Using Multi-Frequency Microwave Radiometry. - Andreas Colliander; Mohammad Mousavi; Sidharth Misra; Shannon T. Brown; John S. Kimball; Julie Z. Miller; Joel T. Johnson; Mariko Burgin (IGARSS, 2022)

Simulation Study of a Probabilistic Measurement Terminator for cloud Radar Systems using Cloudsat data. - Jakob DeLong; Joel T. Johnson (IGARSS, 2022)

Progress in Time-Series Soil Moisture Retrieval Using L- and S-Band Radar Backscatter. - Dustin Horton; Alexandra Bringer; Joel T. Johnson; Jeonghwan Park 001; Rajat Bindlish (IGARSS, 2022)

On the Cutoff Wavenumber in the Geometrical Optics Theory of Near Specular Scattering from the Sea Surface. - Joel T. Johnson; Ethan Raines; Jakov V. Toporkov; Paul A. Hwang; Jeffrey D. Ouellette (IGARSS, 2022)

IMPACT OF CYGNSS LEVEL-2 DERIVED WIND FIELDS ON STORM SURGE MODELING. - Younghun Kang; Ethan J. Kubatko; Joel T. Johnson; Mohammad AI-Khaldi; Stephen J. Katzberg (IGARSS, 2022)

Time-Series Ratio Algorithm for Nisar Soil Moisture Retrieval. - Jeonghwan Park 001; Rajat Bindlish; Alexandra Bringer; Dustin Horton; Joel T. Johnson (IGARSS, 2022)

Wideband Radiometric Signatures of Snow Pack in the Keweenaw Peninsula, Michigan, During the Winter of 2021-22. - Roger D. De Roo; Joel T. Johnson; Mark S. Andrews; Oguz Demir; Alexandra Bringer (IGARSS, 2022)

A Study of the Relationship Between Surface Roughness and GNSS-R Coherent Returns Over Land. - Tianlin Wang; Alexandra Bringer; Joel T. Johnson; Mohammad M. Al-Khaldi (IGARSS, 2022)

The Impact of Firn Models on Ultrawideband Brightness Temperatures in the Partially Coherent Model. - Haokui Xu; Brooke Medley; Leung Tsang; Joel T. Johnson; Kenneth C. Jezek (IGARSS, 2022)

P and L Band Reflectometry Modelling Based on Analytical Kirchhoff Solutions (AKS) with Land Surface Lidar Data. - Haokui Xu; Leung Tsang; Jongwoo Jeong; Joel T. Johnson; Alexandra Bringer; Simon Yueh; Xiaolan Xu (IGARSS, 2022)

A Study of Dome-C Ice Sheet Parameter Estimation Using 0.5-2 GHz Ultra-Wideband Radiometry. - Caglar Yardim; Joel T. Johnson; Kenneth C. Jezek; Mark J. Andrews; Marion Leduc-Leballeur; Marco Brogioni; Giovanni Macelloni (IGARSS, 2022)

Soil Moisture Retrievals Using CYGNSS Data in a Time-Series Ratio Method: Progress Update and Error Analysis. - Mohammad M. Al-Khaldi; Joel T. Johnson (IEEE Geosci. Remote. Sens. Lett., 2022)

500-2000-MHz Airborne Brightness Temperature Measurements Over the East Antarctic Plateau. - Marco Brogioni; Marion Leduc-Leballeur; Mark J. Andrews; Giovanni Macelloni; Joel T. Johnson; Kenneth C. Jezek; Caglar Yardim (IEEE Geosci. Remote. Sens. Lett., 2022)

A Simulation Study of Significant Wave Height Retrieval From Bistatic Scattering of Signals of Opportunity. - Paul A. Hwang; Jeffrey D. Ouellette; Jakov V. Toporkov; Joel T. Johnson (IEEE Geosci. Remote. Sens. Lett., 2022)

A Comparison of Bistatic and Monostatic Radar Images of 1-D Perfectly Conducting Rough Surfaces. - Ethan Raines; James Park 001; Joel T. Johnson; Robert J. Burkholder (IEEE Geosci. Remote. Sens. Lett., 2022)

Diurnal Variations in Ocean Wind Speeds Measured by CYGNSS and Other Satellites. - Yuchan Yi; Joel T. Johnson; Xiaochun Wang (IEEE Geosci. Remote. Sens. Lett., 2022)

Radar Backscattering of Rough Soil Surfaces From L-Band to Ku-Band With NMM3D. - Jiyue Zhu; Leung Tsang; Tien-Hao Liao; Joel T. Johnson; Do Hyuk Kang; Edward J. Kim 001 (IEEE Geosci. Remote. Sens. Lett., 2022)

Physics-Based Forward Modeling of Ocean Surface Swell Effects on SMAP L1-C NRCS Observations. - Shanka N. Wijesundara; Joel T. Johnson (Sensors, 2022)

Fully Adaptive Radar for Multiple Target Tracking. - Peter John-Baptiste; Kristine L. Bell; Joel Tidmore Johnson; Graeme Edward Smith (IEEE Trans. Aerosp. Electron. Syst., 2022)

Neural Network-Based Control of an Adaptive Radar. - Peter John-Baptiste; Joel Tidmore Johnson; Graeme Edward Smith (IEEE Trans. Aerosp. Electron. Syst., 2022)

Properties of the 500-2000-MHz RFI Environment Observed in High-Latitude Airborne Radiometer Measurements. - Mark J. Andrews; Joel T. Johnson; Marco Brogioni; Giovanni Macelloni; Kenneth C. Jezek (IEEE Trans. Geosci. Remote. Sens., 2022)

Intercomparison of Electromagnetic Scattering Models for Delay-Doppler Maps Along a CYGNSS Land Track With Topography. - James D. Campbell; Ruzbeh Akbar; Alexandra Bringer; Davide Comite; Laura Dente; Scott T. Gleason; Leila Guerriero; Erik Hodges; Joel T. Johnson; Seung-Bum Kim; Amer Melebari; Nazzareno Pierdicca; et al. (IEEE Trans. Geosci. Remote. Sens., 2022)

Measurements of 540-1740 MHz Brightness Temperatures of Sea Ice During the Winter of the MOSAiC Campaign. - Oguz Demir; Joel T. Johnson; Kenneth C. Jezek; Mark J. Andrews; Kenneth Ayotte; Gunnar Spreen; Stefan Hendricks; Lars Kaleschke; Marc Oggier; Mats Granskog; Allison Fong; Mario Hoppmann; et al. (IEEE Trans. Geosci. Remote. Sens., 2022)

Studies of Sea-Ice Thickness and Salinity Retrieval Using 0.5-2 GHz Microwave Radiometry. - Oguz Demir; Joel T. Johnson; Kenneth C. Jezek; Marco Brogioni; Giovanni Macelloni; Lars Kaleschke; Ludovic Brucker (IEEE Trans. Geosci. Remote. Sens., 2022)

Feasibility of Estimating Ice Sheet Internal Temperatures Using Ultra-Wideband Radiometry. - Yuna Duan; Caglar Yardim; Michael Durand; Kenneth C. Jezek; Joel T. Johnson; Alexandra Bringer; Shurun Tan; Leung Tsang; Mustafa Aksoy (IEEE Trans. Geosci. Remote. Sens., 2022)

Significant Wave Height and Bistatic Doppler Signals of Microwave Scattering From the Ocean Surface: With Emphasis on the Swell Factor. - Paul A. Hwang; Jeffrey D. Ouellette; Jakov V. Toporkov; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2022)

Relationships Between L-Band Brightness Temperature, Backscatter, and Physical Properties of the Ross Ice Shelf Antarctica. - Kenneth C. Jezek; Shujie Wang; Marion Leduc-Leballeur; Joel T. Johnson; Marco Brogioni; Julie Z. Miller; David G. Long; Giovanni Macelloni (IEEE Trans. Geosci. Remote. Sens., 2022)

Greenland Ice Sheet Subsurface Temperature Estimation Using Ultrawideband Microwave Radiometry. - Caglar Yardim; Joel T. Johnson; Kenneth C. Jezek; Mark J. Andrews; Michael Durand; Yuna Duan; Shurun Tan; Leung Tsang; Marco Brogioni; Giovanni Macelloni; Alexandra Bringer (IEEE Trans. Geosci. Remote. Sens., 2022)

First Results from Mapperr: The Multi-Frequency Active Passive Polar Exploration Radar-Radiometer. - Anna L. Broome; Dustin M. Schroeder; Joel T. Johnson (IGARSS, 2023)

Toward Internal Ice-Sheet Temperature Retrieval Using Microwave Radiometry and Simplified Ice-Flow Models. - Nithin Sugavanam; Emre Ertin; Caglar Yardim; Joel T. Johnson; Kenneth C. Jezek; Joseph A. MacGregor (IGARSS, 2023)

Using Synthetic Cyclone Models for High Wind GNSS-R Calibration, Validation, and Algorithm Development: A CYGNSS Case Study. - Mohammad M. Al-Khaldi; Scott Gleason 001; Joel T. Johnson; Rajeswari Balasubramaniam; Christopher S. Ruf; Darren S. McKague; Bachir Annane; Tianlin Wang; Anthony Russel; Dorina Twigg (IEEE Trans. Geosci. Remote. Sens., 2023)

Joint Active and Passive Microwave Thermometry of Ice Sheets. - Anna L. Broome; Dustin M. Schroeder; Joel T. Johnson (IEEE Trans. Geosci. Remote. Sens., 2023)

Using Lidar Digital Elevation Models for Reflectometry Land Applications. - Erik Hodges; James D. Campbell; Amer Melebari; Alexandra Bringer; Joel T. Johnson; Mahta Moghaddam (IEEE Trans. Geosci. Remote. Sens., 2023)

Efficient Calculation of the Kirchhoff Integral for Predicting the Bistatic Normalized Radar Cross Section of Ocean-Like Surfaces. - Joel T. Johnson; Jakov V. Toporkov; Paul A. Hwang; Jeffrey D. Ouellette (IEEE Trans. Geosci. Remote. Sens., 2023)

Sea Surface Scattering Observations and Predictions Using Satellite-Based S-Band Signals-of-Opportunity. - Jeffrey D. Ouellette; Ethan Raines; Joel T. Johnson; William T. Bounds; David J. Dowgiallo; Jakov V. Toporkov; Paul A. Hwang (IEEE Trans. Geosci. Remote. Sens., 2023)

Radio Dynamic Zones: Motivations, Challenges, and Opportunities to Catalyze Spectrum Coexistence. - Mariya Zheleva; Christopher Robert Anderson; Mustafa Aksoy; Joel T. Johnson; Habib O. Affinnih; Christopher G. DePree (IEEE Commun. Mag., 2023)

Spectrum Sharing between Earth Exploration Satellite and Commercial Services: An Economic Feasibility Analysis. - Jonathan Chamberlain; Joel T. Johnson; David Starobinski (DySPAN, 2024)

Estimating the Retrieval Performance of Passive Remote Sensing Under Alternate Spectrum Sharing Scenarios. - Nicholas J. Brendle; Joel T. Johnson; David Starobinski; Jonathan Chamberlain (IGARSS, 2024)

A Study of the Second Order Small Slope Approximation for L-Band Backscattering from Soil Surfaces. - Dustin Horton; Joel T. Johnson; Mohammad M. Al-Khaldi; Jeonghwan Park 001; Rajat Bindlish (IGARSS, 2024)

Simulations of Ocean Surface Bistatic Doppler Spectra with the Small Slope Approximation. - Joel T. Johnson; Robert J. Burkholder; Joseph Gedney; Jakov V. Toporkov; Jeffrey Ouellette; Shanka N. Wijesundara (IGARSS, 2024)

Remote Sensing Earth's Cryosphere with 0.5-2.0 Ghz Microwave Radiometry: Recent Updates. - Joel T. Johnson; Kenneth C. Jezek; Marco Brogioni; Leung Tsang; Caglar Yardim; Emre Ertin; Nithin Sugavanam; Mark J. Andrews; Lars Kaleschke; Giovanni Macelloni; Shujie Wang (IGARSS, 2024)

Impact of Spectral Spreading Functions on Modeling the Sea Backscatter Cross Section at Microwave Frequencies. - Jakov V. Toporkov; Jeffrey D. Ouellette; Joel T. Johnson (IGARSS, 2024)

Simulating 0.4-2.5 GHz Brightness Temperatures of the Ross Ice Shelf, Antarctica. - Marco Brogioni; Kenneth C. Jezek; Joel T. Johnson; Marion Leduc-Leballeur; Caglar Yardim; Leung Tsang; Shujie Wang; Giovanni Macelloni (IEEE Geosci. Remote. Sens. Lett., 2024)

Modeling Soil Moisture Retrieval Errors in the Time-Series Ratio Method. - Dustin Horton; Alexandra Bringer; Joel T. Johnson; Jeonghwan Park 001; Mohammad M. Al-Khaldi; Rajat Bindlish (IEEE Geosci. Remote. Sens. Lett., 2024)

A Study of the Kirchhoff Approximation for the Coherent Reflection Coefficient of a 1-D Perfectly Conducting Rough Surface. - Ethan Raines; Joel T. Johnson (IEEE Geosci. Remote. Sens. Lett., 2024)

An Analysis of a Commercial GNSS-R Soil Moisture Dataset. - Mohammad M. Al-Khaldi; Joel T. Johnson; Dustin Horton; Darren S. McKague; Dorina Twigg; Anthony Russel; Frederick Policelli; Jeffrey D. Ouellette; Rajat Bindlish; Jeonghwan Park 001 (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024)

Reservoir Water Level Monitoring Using CYGNSS's Level-1 Observations. - Nicholas J. Brendle; Steven Tsz K. Chan; George Hajj; Mohammad M. Al-Khaldi; Joel T. Johnson (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024)

Ocean Wave Period Measurements Using S-Band Signals of Opportunity Reflections. - James Gaudreau; Ethan Raines; Joel T. Johnson; James L. Garrison; Jeffrey D. Ouellette; Rashmi Shah (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024)

Impacts of Spaceborne GNSS-R System Observations on Storm Surge Prediction: A Hurricane Harvey Case Study Using CYGNSS Full DDM Downlinks. - Younghun Kang; Ethan J. Kubatko; Mohammad M. Al-Khaldi; Joel T. Johnson; Suranjan Nepal; Aaron Sines (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024)

Soil Moisture Retrieval Using CYGNSS Data in a Time-Series Ratio Method: Progress Update and Error Analysis, Part II. - Jeffrey D. Ouellette; Mohammad M. Al-Khaldi; Joel T. Johnson (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024)

NISAR Time-Series Ratio Algorithm for Soil Moisture Retrieval: Prelaunch Evaluation With SMAPVEX12 Field Campaign Data. - Jeonghwan Park 001; Rajat Bindlish; Alexandra Bringer; Dustin Horton; Joel T. Johnson (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024)

L-Band Full-Wave Simulations of the Effective Permittivity of Bi/Tri-Continuous Media With Applications to Firn Aquifer in Polar Regions and Terrestrial Wet Snow. - Zhenming Huang; Haokui Xu; Firoz Kanti Borah; Leung Tsang; Brooke Medley; Joel T. Johnson; Roger D. De Roo (IEEE Trans. Geosci. Remote. Sens., 2024)

Active and Passive Microwave Remote Sensing of Priestley Glacier, Antarctica. - Kenneth C. Jezek; Marco Brogioni; Joel T. Johnson; Dustin M. Schroeder; Anna L. Broome; Giovanni Macelloni (IEEE Trans. Geosci. Remote. Sens., 2024)

Wildfire Threshold Detection and Progression Monitoring Using an Improved Radar Vegetation Index in California. - Dustin Horton; Joel T. Johnson; Ismail Baris; Thomas Jagdhuber; Rajat Bindlish; Jeonghwan Park 001; Mohammad M. Al-Khaldi (Remote. Sens., 2024)

Facilitating Spectrum Sharing With Passive Satellite Incumbents. - Jonathan Chamberlain; David Starobinski; Joel T. Johnson (IEEE J. Sel. Areas Commun., 2024)

Advancing Spectrum Sharing through Statistical Analysis of EESS-Passive Satellite Overpasses. - Nicholas J. Brendle; Jonathan Chamberlain; Joel T. Johnson; David Starobinski (DySPAN, 2025)

An Analysis of a Commercial GNSS-R Ocean Wind Speed Dataset. - Mohammad M. Al-Khaldi; Joel T. Johnson; Darren S. McKague; Dorina Twigg; Anthony Russel; Frederick Policelli (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2025)

Near-Specular Interferometry With Signals of Opportunity Systems: Potential and Limitations. - Mohammad M. Al-Khaldi; Joel T. Johnson; Steven Tsz K. Chan; George Hajj (IEEE Trans. Geosci. Remote. Sens., 2025)

Detection and Analysis of GPS L1-Band Radio Frequency Interference Using Spaceborne Global Navigation Satellite System Reflectometry Receivers. - Mohammad M. Al-Khaldi; Joel T. Johnson; Darren S. McKague; Scott Gleason 001; Frederick Policelli; Rajat Bindlish; Dorina Twigg; Anthony Russel (IEEE Trans. Geosci. Remote. Sens., 2025)

A Merged CYGNSS Soil Moisture Product Using a Minimum Variance Estimator. - Erik Hodges; Clara C. Chew; Eric E. Small; Dinan Bai; Mohammad M. Al-Khaldi; Jeffrey D. Ouellette; Joel T. Johnson; Fangni Lei; Mehmet Kurum; Ali Cafer Gürbüz; Volkan Yusuf Senyurek; M. M. Nabi; et al. (IEEE Trans. Geosci. Remote. Sens., 2025)

Hydrodynamic Modulation Transfer Functions for the Creamer and Choppy Wave Surface Models and Their Impact on Doppler Scattering Simulations. - Jakov V. Toporkov; Joel T. Johnson; Jeffrey D. Ouellette (IEEE Trans. Geosci. Remote. Sens., 2025)