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Proceedings Paper

Radiometric quality of the MODIS bands at 667 and 678nm
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Paper Abstract

The MODIS instruments on Terra and Aqua were designed to allow the measurement of chlorophyll fluorescence effects over ocean. The retrieval algorithm is based on the difference between the water-leaving radiances at 667nm and 678nm. The water-leaving radiances at these wavelengths are usually very low relative to the topof- atmosphere radiances. The high radiometric accuracy needed to retrieve the small fluorescence signal lead to a dual gain design for the 667 and 678nm bands. This paper discusses the benefits obtained from this design choice and provides justification for the use of only one set of gains for global processing of ocean color products. Noise characteristics of the two bands and their related products are compared to other products of bands from 412nm to 2130nm. The impact of polarization on the two bands is discussed. In addition, the impact of stray light on the two bands is compared to other MODIS bands.

Paper Details

Date Published: 13 September 2011
PDF: 14 pages
Proc. SPIE 8153, Earth Observing Systems XVI, 81531M (13 September 2011); doi: 10.1117/12.892022
Show Author Affiliations
Gerhard Meister, NASA Goddard Space Flight Ctr. (United States)
Bryan A. Franz, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 8153:
Earth Observing Systems XVI
James J. Butler; Xiaoxiong Xiong; Xingfa Gu, Editor(s)

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