Dr. Dennis Helder has been involved with the characterization and calibration of spaceborne and airborne remote sensing imaging systems for nearly 30 years, and he founded the SDSU Imaging Processing Laboratory in 1990. Initial work focused on characterization and removal of radiometric artifacts of the Landsat TM and MSS sensors. More recent work has emphasized development of vicarious radiometric calibration approaches for a variety of optical remote sensing systems as well as on-orbit point spread function estimation. He is currently Associate Dean for Engineering Research and Distinguished Professor of Electrical Engineering at South Dakota State University; he is also on detail to USGS EROS where he serves as Director of the EROS CalVal Center of Excellence.
Ph.D. from North Dakota State University
B.S. and M.S. in Electrical Engineering from SDSU
Selected Peer Reviewed Publications
Mishra, N., Helder, D., Barsi, J., & Markham, B. (2016). Continuous calibration improvement in solar reflective bands: Landsat 5 through Landsat 8. Remote Sensing of the Environment, Vol 185, 7-15.
Pinto, C., Ponzoni, F., Castro, R., Leigh, L., Mishra, N., Aaron, D., & Helder, D. (2016). First in-flight radiometric calibration of MUX and WFI on-board CBERS-4. Remote Sensing, 8(5), 405.
Mishra, N., Helder, D., Angal, A., Choi, J., & Xiong, X. (2014). Absolute calibration of the optical satellite sensors using Libya 4 pseudo invariant calibration site. Remote Sensing, 6(2), 1327-1346.
A. Angal, X. Xiong, T. Choi, G. Chander, N. Mishra, D. Helder, Impact of Terra MODIS Collection 6 on long-term trending comparisons with Landsat 7 ETM+ Reflective Solar Bands,” Remote Sensing Letters, Vol. 4, No. 9, 2013.
D. Helder, K. Thome, N. Mishra, G. Chander, X. Xiong, A. Angal, T. Choi, “Absolute Radiometric Calibration of Landsat Using a Pseudo Invariant Calibration Site,” IEEE Transactions Geoscience and Remote Sensing, Vol. 51, No. 13, Mar 2013.
G. Chander, D. Helder, N. Mishra, A. Shrestha, “Assessment of Spectral, Misregistration, and Spatial Uncertainties Inherent in the Cross-Calibration Study,” IEEE Transactions Geoscience and Remote Sensing, Vol. 51, No. 13, Mar 2013.
G. Chander, N. Mishra, D. Helder, D. Aaron, A. Angal, T. Choi, X. Xiong, D. Doelling, “Applications of Spectral Band Adjustment Factors (SBAF) for Cross-Calibration,” IEEE Transactions Geoscience and Remote Sensing, Vol. 51, No. 13, Mar 2013.
D. Helder, R. Malla, C. Mettler, B. Markham, E. Micijevic, “Landsat 4 Thematic Mapper Calibration Update,” IEEE Transactions Geoscience and Remote Sensing, Vol. 50, No. 6, pp. 2400-2408, June, 2012.
D. Helder, S. Karki, R. Bhatt, E. Micijevic, D. Aaron, “Radiometric Calibration of the Landsat MSS Sensor Series,” IEEE Transactions Geoscience and Remote Sensing, Vol. 50, No. 6, pp. 2380-2399, June, 2012.
B. Markham, M. Haque, J. Barsi, E. Micijevic, D. Helder, K. Thome, D. Aaron, J. Czapla-Myers, “Landsat-7 ETM+: 12 Years On-Orbit Reflective-Band Radiometric Performance,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 50, No. 5, pp. 2056—2062.
D. Helder, K. Thome, D. Aaron, L. Leigh, J. Czapla-Myers, N. Leisso, S. Biggar, N. Anderson, “Recent surface reflectance measurement campaigns with emphasis on best practices, SI traceability and uncertainty estimation,” Metrologia 49 (2012) S21-S28.
B. Markham, D. Helder, “Forty-Year Calibrated Record of Earth Reflected Radiance from Landsat: A Review,” Remote Sensing of the Environment, submitted 2011 (invited paper).
D. Helder, B. Basnet, D. Morstad, “Optimized Identification of Worldwide Radiometric Pseudo-Invariant Calibration Sites,” Canadian Journal of Remote Sensing, July 2011.