A radiometric evaluation of the Advanced Land Imager. - Dennis L. Helder; Samer L. Hijazi; Timothy A. Ruggles (IGARSS, 2002)

Landsat-4/5 Band 6 relative radiometry. - Gyanesh Chander; Dennis L. Helder; Wayne C. Boncyk (IEEE Trans. Geosci. Remote. Sens., 2002)

Landsat-5 TM reflective-band absolute radiometric calibration. - Gyanesh Chander; Dennis L. Helder; Brian L. Markham; James D. Dewald; Ed Kaita; Kurtis J. Thome; Esad Micijevic; Timothy A. Ruggles (IEEE Trans. Geosci. Remote. Sens., 2004)

Cross calibration of the Landsat-7 ETM+ and EO-1 ALI sensor. - Gyanesh Chander; David J. Meyer; Dennis L. Helder (IEEE Trans. Geosci. Remote. Sens., 2004)

Landsat-5 Thematic Mapper outgassing effects. - Dennis L. Helder; Esad Micijevic (IEEE Trans. Geosci. Remote. Sens., 2004)

Landsat thematic mapper reflective-band radiometric artifacts. - Dennis L. Helder; Timothy A. Ruggles (IEEE Trans. Geosci. Remote. Sens., 2004)

Landsat-5 Thematic Mapper reflective-band radiometric stability. - Dennis L. Helder; Timothy A. Ruggles; James D. Dewald; Sriharsha Madhavan (IEEE Trans. Geosci. Remote. Sens., 2004)

In-flight validation and recovery of water surface temperature with Landsat-5 thermal infrared data using an automated high-altitude lake validation site at Lake Tahoe. - Simon J. Hook; Gyanesh Chander; Julia A. Barsi; Ronald E. Alley; Ali Abtahi; Frank D. Palluconi; Brian L. Markham; Robert C. Richards; S. Geoffrey Schladow; Dennis L. Helder (IEEE Trans. Geosci. Remote. Sens., 2004)

Landsat-7 ETM+ on-orbit reflective-band radiometric stability and absolute calibration. - Brian L. Markham; Kurtis J. Thome; Julia A. Barsi; Ed Kaita; Dennis L. Helder; John L. Barker; Pat L. Scaramuzza (IEEE Trans. Geosci. Remote. Sens., 2004)

Landsat-5 TM and Landsat-7 ETM+ absolute radiometric calibration using the reflectance-based method. - Kurtis J. Thome; Dennis L. Helder; David Aaron; James D. Dewald (IEEE Trans. Geosci. Remote. Sens., 2004)

Radiometric Calibration of Reflective Bands of Landsat 4 Thematic Mapper using Pseudo-Invariant Site Technique. - Rimy Malla; Dennis L. Helder (IGARSS (4), 2008)

Use of Pseudo-Invariant Sites for Long-Term Sensor Calibration. - Daniel L. Morstad; Dennis L. Helder (IGARSS (1), 2008)

Updated Radiometric Calibration for the Landsat-5 Thematic Mapper Reflective Bands. - Dennis L. Helder; Brian L. Markham; Kurtis J. Thome; Julia A. Barsi; Gyanesh Chander; Rimy Malla (IEEE Trans. Geosci. Remote. Sens., 2008)

Use of EO-1 Hyperion data to calculate spectral band adjustment factors (SBAF) between the L7 ETM+ and Terra MODIS sensors. - Gyanesh Chander; Nischal Mishra; Dennis L. Helder; David Aaron; Taeyoung Choi; Amit Angal; Xiaoxiong Xiong (IGARSS, 2010)

Spectral reflectance measurement methodologies for Tuz Golu field campaign. - Irina Boucher; Françoise Viallefont; Andrew Deadman; Nigel P. Fox; Irina Behnert; Derek Griffith; Peter Harris; Dennis L. Helder; Els Knaeps; Larry Leigh; Yuan Li; Hilal Özen; et al. (IGARSS, 2011)

Tuz Gölü site Characteristics. - Larry Leigh; Dennis L. Helder; Irina Behnert; Irina Deadman; Nigel P. Fox; Ugur M. Leloglu; Hilal Özen; Derek Griffith (IGARSS, 2011)

Continued monitoring of Landsat reflective band calibration using pseudo-invariant calibration sites. - Julia A. Barsi; Brian L. Markham; Dennis L. Helder (IGARSS, 2012)

Comparison of radiometric gain of optical satellite sensors using Tuz Golu radiometrically calibrated test site. - Hilal Özen; Nigel P. Fox; Andrew Deadman; Irina Behnert; Peter Harris; Sevgi Zübeyde Gürbüz; Li Yuan; Derek Griffith; Morakot Kaewmanee; A. Prakobya; Chaichat Musana; Flávio Ponzoni; et al. (IGARSS, 2012)

Radiometric Calibration of the Landsat MSS Sensor Series. - Dennis L. Helder; Sadhana Karki; Rajendra Bhatt; Esad Micijevic; David Aaron; Benjamin Jasinski (IEEE Trans. Geosci. Remote. Sens., 2012)

Landsat 4 Thematic Mapper Calibration Update. - Dennis L. Helder; Rimy Malla; Cory J. Mettler; Brian L. Markham; Esad Micijevic (IEEE Trans. Geosci. Remote. Sens., 2012)

Landsat-7 ETM+: 12 Years On-Orbit Reflective-Band Radiometric Performance. - Brian L. Markham; Md. Obaidul Haque; Julia A. Barsi; Esad Micijevic; Dennis L. Helder; Kurtis J. Thome; David Aaron; Jeffrey Czapla-Myers (IEEE Trans. Geosci. Remote. Sens., 2012)

Assessment of Spectral, Misregistration, and Spatial Uncertainties Inherent in the Cross-Calibration Study. - Gyanesh Chander; Dennis L. Helder; David Aaron; Nischal Mishra; Alok K. Shrestha (IEEE Trans. Geosci. Remote. Sens., 2013)

Applications of Spectral Band Adjustment Factors (SBAF) for Cross-Calibration. - Gyanesh Chander; Nischal Mishra; Dennis L. Helder; David Aaron; Amit Angal; Taeyoung Choi; Xiaoxiong Xiong; David R. Doelling (IEEE Trans. Geosci. Remote. Sens., 2013)

Absolute Radiometric Calibration of Landsat Using a Pseudo Invariant Calibration Site. - Dennis L. Helder; Kurtis J. Thome; Nischal Mishra; Gyanesh Chander; Xiaoxiong Xiong; Amit Angal; Taeyoung Choi (IEEE Trans. Geosci. Remote. Sens., 2013)

Cross-calibration of Landsat 5 TM and Landsat 8 OLI with Aqua MODIS using PICS. - Amit Angal; Nischal Mishra; Xiaoxiong Xiong; Dennis L. Helder (Earth Observing Systems, 2014)

Landsat-8 operational land imager on-orbit radiometric calibration and stability. - Brian L. Markham; Julia A. Barsi; Edward Kaita; Lawrence Ong; Md. Obaidul Haque; Nischal Mishra; Jeffrey Czapla-Myers; Nima Pahlevan; Dennis L. Helder (Earth Observing Systems, 2014)

Landsat-8 Operational Land Imager Radiometric Calibration and Stability. - Brian L. Markham; Julia A. Barsi; Geir Kvaran; Lawrence Ong; Edward Kaita; Stuart F. Biggar; Jeffrey Czapla-Myers; Nischal Mishra; Dennis L. Helder (Remote. Sens., 2014)

Absolute Calibration of Optical Satellite Sensors Using Libya 4 Pseudo Invariant Calibration Site. - Nischal Mishra; Dennis L. Helder; Amit Angal; Jason Choi; Xiaoxiong Xiong (Remote. Sens., 2014)

Radiometric Cross Calibration of Landsat 8 Operational Land Imager (OLI) and Landsat 7 Enhanced Thematic Mapper Plus (ETM+). - Nischal Mishra; Md. Obaidul Haque; Larry Leigh; David Aaron; Dennis L. Helder; Brian L. Markham (Remote. Sens., 2014)

The Ground-Based Absolute Radiometric Calibration of Landsat 8 OLI. - Jeffrey Czapla-Myers; Joel McCorkel; Nikolaus Anderson; Kurtis J. Thome; Stuart F. Biggar; Dennis L. Helder; David Aaron; Larry Leigh; Nischal Mishra (Remote. Sens., 2015)

Radiometric Non-Uniformity Characterization and Correction of Landsat 8 OLI Using Earth Imagery-Based Techniques. - Frank Pesta; Suman Bhatta; Dennis L. Helder; Nischal Mishra (Remote. Sens., 2015)

Pre- and Post-Launch Spatial Quality of the Landsat 8 Thermal Infrared Sensor. - Brian N. Wenny; Dennis L. Helder; Jungseok Hong; Larry Leigh; Kurtis J. Thome; Dennis Reuter (Remote. Sens., 2015)

Landsat-7 ETM+ radiometric calibration status. - Julia A. Barsi; Brian L. Markham; Jeffrey S. Czapla-Myers; Dennis L. Helder; Simon J. Hook; John R. Schott; Md. Obaidul Haque (Earth Observing Systems, 2016)

First in-Flight Radiometric Calibration of MUX and WFI on-Board CBERS-4. - Cibele T. Pinto; Flávio Ponzoni; Ruy M. Castro; Larry Leigh; Nischal Mishra; David Aaron; Dennis L. Helder (Remote. Sens., 2016)

Statistical relative gain calculation for Landsat 8. - Cody Anderson; Dennis L. Helder; Drake Jeno (Earth Observing Systems, 2017)

A reflectance-based cross calibration of the Landsat sensors. - Cibele Teixeira Pinto; Sandeep Chittimalli; Larry Leigh; Timothy A. Ruggles; Dennis L. Helder (Earth Observing Systems, 2017)

SBAF for cross-calibration of Landsat-8 OLI and Sentinel-2 MSI over North African PICS. - Cibele Teixeira Pinto; Mahesh Shrestha; Nahid Hasan; Larry Leigh; Dennis L. Helder (Earth Observing Systems, 2018)

Nasa's Black Marble Product Suite: Validation Strategy. - Zhuosen Wang; Miguel O. Roman; Qingsong Sun; Virginia L. Kalb; Kytt MacManus; Robert E. Ryan; Mary Pagnutti; Dennis L. Helder (IGARSS, 2018)

Observations and Recommendations for the Calibration of Landsat 8 OLI and Sentinel 2 MSI for Improved Data Interoperability. - Dennis L. Helder; Brian L. Markham; Ron Morfitt; James C. Storey; Julia A. Barsi; Ferran Gascon; Sébastien Clerc; Bruno Lafrance; Jeffrey G. Masek; David P. Roy; Adam Lewis; Nima Pahlevan (Remote. Sens., 2018)

The U. S. Geological Survey's Approach to Analysis Ready Data. - Cody Anderson; Steve Labahn; Dennis L. Helder; Greg Stensaas; Christopher Engebretson; Christopher J. Crawford; Calli B. Jenkerson; Christopher Barnes (IGARSS, 2019)

Methods for Earth-Observing Satellite Surface Reflectance Validation. - Moe Badawi; Dennis L. Helder; Larry Leigh; Xin Jing (Remote. Sens., 2019)

Evaluation of an Extended PICS (EPICS) for Calibration and Stability Monitoring of Optical Satellite Sensors. - Nahid Hasan; Mahesh Shrestha; Larry Leigh; Dennis L. Helder (Remote. Sens., 2019)

Evaluation of RadCalNet Output Data Using Landsat 7, Landsat 8, Sentinel 2A, and Sentinel 2B Sensors. - Xin Jing; Larry Leigh; Cibele Teixeira Pinto; Dennis L. Helder (Remote. Sens., 2019)

Empirical Absolute Calibration Model for Multiple Pseudo-Invariant Calibration Sites. - Bipin Raut; Morakot Kaewmanee; Amit Angal; Xiaoxiong Xiong; Dennis L. Helder (Remote. Sens., 2019)

The Terra Vega Active Light Source: A First Step in a New Approach to Perform Nighttime Absolute Radiometric Calibrations and Early Results Calibrating the VIIRS DNB. - Robert E. Ryan; Mary Pagnutti; Kara Burch; Larry Leigh; Timothy A. Ruggles; Changyong Cao; David Aaron; Slawomir Blonski; Dennis L. Helder (Remote. Sens., 2019)

Extended Pseudo Invariant Calibration Sites (EPICS) for the Cross-Calibration of Optical Satellite Sensors. - Mahesh Shrestha; Nahid Hasan; Larry Leigh; Dennis L. Helder (Remote. Sens., 2019)

Derivation of Hyperspectral Profile of Extended Pseudo Invariant Calibration Sites (EPICS) for Use in Sensor Calibration. - Mahesh Shrestha; Nahid Hasan; Larry Leigh; Dennis L. Helder (Remote. Sens., 2019)

Classification of North Africa for Use as an Extended Pseudo Invariant Calibration Sites (EPICS) for Radiometric Calibration and Stability Monitoring of Optical Satellite Sensors. - Mahesh Shrestha; Larry Leigh; Dennis L. Helder (Remote. Sens., 2019)

New Approach for Temporal Stability Evaluation of Pseudo-Invariant Calibration Sites (PICS). - Fatima Tuz Zafrin Tuli; Cibele Teixeira Pinto; Amit Angal; Xiaoxiong Xiong; Dennis L. Helder (Remote. Sens., 2019)

Lifetime Absolute Calibration of the EO-1 Hyperion Sensor and its Validation. - Xin Jing; Larry Leigh; Dennis L. Helder; Cibele Teixeira Pinto; David Aaron (IEEE Trans. Geosci. Remote. Sens., 2019)

Landsats 1-5 Multispectral Scanner System Sensors Radiometric Calibration Update. - Cibele Teixeira Pinto; Md. Obaidul Haque; Esad Micijevic; Dennis L. Helder (IEEE Trans. Geosci. Remote. Sens., 2019)

Radiometric Cross Calibration and Validation Using 4 Angle BRDF Model between Landsat 8 and Sentinel 2A. - Md. Mehedi Farhad; Morakot Kaewmanee; Larry Leigh; Dennis L. Helder (Remote. Sens., 2020)

Observations and Recommendations for Coordinated Calibration Activities of Government and Commercial Optical Satellite Systems. - Dennis L. Helder; Cody Anderson; Keith Beckett; Rasmus Houborg; Ignacio Zuleta; Valentina Boccia; Sébastien Clerc; Michele Kuester; Brian L. Markham; Mary Pagnutti (Remote. Sens., 2020)

Calibrating Geosynchronous and Polar Orbiting Satellites: Sharing Best Practices. - Dennis L. Helder; David R. Doelling; Rajendra Bhatt; Taeyoung Choi; Julia A. Barsi (Remote. Sens., 2020)

Vicarious Methodologies to Assess and Improve the Quality of the Optical Remote Sensing Images: A Critical Review. - Sakib Kabir; Larry Leigh; Dennis L. Helder (Remote. Sens., 2020)

Classification and Evaluation of Extended PICS (EPICS) on a Global Scale for Calibration and Stability Monitoring of Optical Satellite Sensors. - Juliana Fajardo Rueda; Larry Leigh; Cibele Teixeira Pinto; Morakot Kaewmanee; Dennis L. Helder (Remote. Sens., 2021)

DLR Earth Sensing Imaging Spectrometer (DESIS) Level 1 Product Evaluation Using RadCalNet Measurements. - Mahesh Shrestha; Dennis L. Helder; Jon Christopherson (Remote. Sens., 2021)

Relative Radiometric Correction of Pushbroom Satellites Using the Yaw Maneuver. - Christopher Begeman; Dennis L. Helder; Larry Leigh; Chase Pinkert (Remote. Sens., 2022)

Initial Cross-Calibration of Landsat 8 and Landsat 9 Using the Simultaneous Underfly Event. - Garrison Gross; Dennis L. Helder; Christopher Begeman; Larry Leigh; Morakot Kaewmanee; Ramita Shah (Remote. Sens., 2022)

Extended Cross-Calibration Analysis Using Data from the Landsat 8 and 9 Underfly Event. - Garrison Gross; Dennis L. Helder; Larry Leigh (Remote. Sens., 2023)

Implementing a Dual-Spectrometer Approach for Improved Surface Reflectance Estimation. - Mahesh Shrestha; Joshua Mann; Emily Maddox; Terry Robbins; Jeffrey Irwin; Travis Kropuenske; Dennis L. Helder (Remote. Sens., 2023)