NDLI: Solar zenith angle correction of global NDVI time-series from AVHRR

Content Provider	IEEE Xplore Digital Library
Author	Deng, M. Di, L.
Copyright Year	2001
Description	Author affiliation: Raytheon ITSS, Lanham, MD, USA (Deng, M.)
Abstract	Previous studies found that global NDVI time-series products from many different producers have the same kind of systematic errors, including the increase of NDVI values with the aging of a NOAA POES satellite and a drop of NDVI values when a new satellite replaced the old one. By examining the NOAA/NASA pathfinder AVHRR Land product, this study found that the increase of solar zenith angles due to the orbital drifting of the NOAA satellites is the main cause of the systematic errors. It is also found that statistically NDVI values increase linearly with the increase of solar-zenith angles, and this relationship is basically the same for NOAA-7, NOAA-9, and NOAA-11. By using the regression method, we obtained the rate of increase of NDVI values with the increase of solar-zenith angle. The rate is 0.1571 NDVI units per radian. The rate was applied back to the global annual maximum NDVI composites from 1982 to 1994 derived from NOAA/NASA Pathfinder AVHRR Land product to compensate the increase of solar-zenith angles. Results showed that most of the increase in NDVI values related to the aging of NOAA satellites was removed.
Starting Page	1838
Ending Page	1840
File Size	168299
Page Count	3
File Format	PDF
ISBN	0780370317
DOI	10.1109/IGARSS.2001.977089
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-07-09
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Satellite broadcasting Aging NASA Vegetation Radiometry Monitoring Error correction Remote sensing History Atmospheric measurements
Content Type	Text
Resource Type	Article

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