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Proceedings Paper

On-orbit performance of the MODIS reflective solar bands time-dependent response versus scan angle algorithm
Author(s): J. Sun; X. Xiong; A. Angal; H. Chen; Xu Geng; A. Wu
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Paper Abstract

Time-dependent Response versus Scan angle (RVS) is vital for MODIS Reflective Solar Bands (RSB) on-orbit calibration. Time-dependent RVS Look-Up Tables (LUT) have been applied to MODIS Level 1B (L1B) since Collection 4. Various approaches have been developed to derive the time-dependent RVS LUT for MODIS RSB. The Collection 4 time-dependent RVS was developed based on the response from the on-board calibrators. In Collection 5, the RVS is derived using the on-board calibrators with additional input of mirror side differences from invariant ocean targets. The Collection 5 methodology is carried over in Collection 6 for most RSB with the exception of Terra MODIS bands 1-4, and 8-9 and Aqua MODIS bands 8-9, where response trending from pseudo-invariant desert targets is used in addition to the measurements from the on-board calibrators. For these bands, the SD/SDSM calibration may not provide accurate gains and/or the linear approximation for the AOI dependence may not be adequate. As a result, earth scene response trending is used in Collection 6 for the derivation of the RVS for the aforementioned bands. In this report, we review all the methodologies used to derive the on-orbit RVS and the performance of the derived timedependent RVS.

Paper Details

Date Published: 15 October 2012
PDF: 9 pages
Proc. SPIE 8510, Earth Observing Systems XVII, 85100J (15 October 2012); doi: 10.1117/12.930021
Show Author Affiliations
J. Sun, Sigma Space Corp. (United States)
X. Xiong, NASA Goddard Space Flight Ctr. (United States)
A. Angal, Science Systems and Applications, Inc. (United States)
H. Chen, Sigma Space Corp. (United States)
Xu Geng, Sigma Space Corp. (United States)
A. Wu, Sigma Space Corp. (United States)


Published in SPIE Proceedings Vol. 8510:
Earth Observing Systems XVII
James J. Butler; Xiaoxiong Xiong; Xingfa Gu, Editor(s)

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