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

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)

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)

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)