Radiometric Calibration for AgCam
| Autor: | Ho Jin Kim, Edward Hildum, Changyong Dou, Xiaodong Zhang, Lianbo Hu, Doug Olsen |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
vignetting
Physics Vignetting business.industry least squares fit Astrophysics::Instrumentation and Methods for Astrophysics radiometric calibration Reduction (complexity) remote sensing Wavelength CCD quantum efficiency Optics International Space Station Calibration General Earth and Planetary Sciences lcsh:Q Quantum efficiency lcsh:Science business Radiometric calibration Remote sensing Dark current |
| Zdroj: | Remote Sensing Volume 2 Issue 2 Pages: 464-477 Remote Sensing, Vol 2, Iss 2, Pp 464-477 (2010) |
| ISSN: | 2072-4292 |
| DOI: | 10.3390/rs2020464 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|