Title :
Comparison of Terra and Aqua MODIS VIS Bands On-Orbit Response
Author :
Xiong, Xiaoxiong ; Sun, Junqiang ; Che, Nianzen ; Angal, Amit ; Choi, Jason
Author_Institution :
GSFC, Sci. & Exploration Directorate, NASA, Greenbelt, MD
Abstract :
MODIS reflective solar bands (RSB) cover the VIS, NIR, and SWIR spectral regions. They are calibrated by a set of on-board calibrators (OBC). The 7 VIS spectral bands are located on the same focal plane assembly (FPA), with wavelengths from 0.41 to 0.56 mum. On-orbit observations show that the changes in the VIS response have been relatively large compared to the other spectral bands. This paper provides a comprehensive study of changes in the VIS response for both Terra and Aqua MODIS. It examines the differences among individual detectors within the same spectral band and between the two mirror sides. Results derived from measurements made by the instrument OBC and regularly scheduled lunar observations show that Aqua MODIS has been more stable than Terra MODIS in the VIS spectral region, with small response changes and mirror side differences over time.
Keywords :
aerospace instrumentation; artificial satellites; geophysical equipment; geophysical techniques; image sensors; performance evaluation; remote sensing; Aqua MODIS visible band; FPA; MODIS RSB; MODIS reflective solar bands; MODIS visible band on orbit response; NIR spectral region; SWIR spectral region; Terra MODIS visible band; focal plane assembly; on board calibrators; visible spectral region; wavelength 0.41 mum to 0.56 mum; Assembly; Calibration; Infrared detectors; Infrared spectra; Instruments; MODIS; Mirrors; Moon; NASA; Spatial resolution; Characterization; MODIS; SNR;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2008. IGARSS 2008. IEEE International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2807-6
Electronic_ISBN :
978-1-4244-2808-3
DOI :
10.1109/IGARSS.2008.4779981
