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Status of Terra and Aqua MODIS InstrumentsCurrently, two nearly identical MODIS instruments are operating in space: one on the Terra spacecraft launched in December 1999 and another on the Aqua spacecraft launched in May 2002. MODIS has 36 spectral bands with wavelengths covering from visible (VIS) to long-wave infrared (LWIR). Since launch, MODIS observations and data products have contributed significantly to studies of changes in the Earth system of land, oceans, and atmosphere. To maintain its on-orbit calibration and data product quality, MODIS was built with a comprehensive set of on-board calibrators, consisting of a solar diffuser (SD) and a solar diffuser stability monitor (SDSM) for the reflective solar bands (RSB) and an on-board blackbody (BB) for the thermal emissive bands (TEB). Both instruments have demonstrated good performance. The primary Level 1 B (LIB) data products are top of the atmosphere (TOA) reflectance for RSB and radiance for TEB This paper provides an overview of MODIS calibration methodologies, activities, lifetime on-orbit performance and challenging issues for each MODIS, the impact on LIB product quality, and lessons learned for future sensors such as the NPOESS VIIRS.
Document ID
20090005999
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Xiong, Xiaoxiong
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wenny, Brian N.
(Science Systems and Applications, Inc. Lanham, MD, United States)
Kuyper, James
(Science Systems and Applications, Inc. Lanham, MD, United States)
Salomonson, Vicent
(Utah Univ. Salt Lake City, UT, United States)
Barmes. William
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Date Acquired
August 24, 2013
Publication Date
December 14, 2008
Subject Category
Solar Physics
Meeting Information
Meeting: American Geophysical Union Conference
Location: San Francisco, CA
Country: United States
Start Date: December 14, 2008
End Date: December 19, 2008
Distribution Limits
Public
Copyright
Other

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