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Remote Sens. 2010, 2(2), 464-477; doi:10.3390/rs2020464

Radiometric Calibration for AgCam

1
The Northern Great Plains Center for People and the Environment, University of North Dakota, Grand Forks, ND 58202-9011,USA
2
Center for Earth Observation and Digital Earth, Chinese Academy of Sciences, Beijing 100012, P.R. China
3
Ocean Remote Sensing Institute, Ocean University of China, Qingdao, Shandong, 266003, P.R.China
4
Airborne Science and Technology Laboratory, NASA Ames Research Center, Moffett Field, CA 94035, USA
This work was done while Changyong Dou was a visiting student at the University of North Dakota, USA
*
Author to whom correspondence should be addressed.
Received: 8 January 2010 / Revised: 25 January 2010 / Accepted: 26 January 2010 / Published: 1 February 2010
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Abstract

The student-built Agricultural Camera (AgCam) now onboard the International Space Station observes the Earth surface through two linescan cameras with Charge-Coupled Device (CCD) arrays sensitive to visible and near-infrared wavelengths, respectively. The electro-optical components of the AgCam were characterized using precision calibration equipment; a method for modeling and applying these measurements was derived. Correction coefficients to minimize effects of optical vignetting, CCD non-uniform quantum efficiency, and CCD dark current are separately determined using a least squares fit approach. Application of correction coefficients yields significant variability reduction in flat-field images; comparable results are obtained when applied to ground test images. View Full-Text
Keywords: radiometric calibration; CCD quantum efficiency; vignetting; least squares fit; remote sensing radiometric calibration; CCD quantum efficiency; vignetting; least squares fit; remote sensing
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Olsen, D.; Dou, C.; Zhang, X.; Hu, L.; Kim, H.; Hildum, E. Radiometric Calibration for AgCam. Remote Sens. 2010, 2, 464-477.

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