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Evaluation of AIRS, MODIS, and HIRS 11 Micron Brightness Temperature Difference Changes from 2002 through 2006In an effort to validate the accuracy and stability of AIRS data at low scene temperatures (200-250 K range), we evaluated brightness temperatures at 11 microns with Aqua MODIS band 31 and HIRS/3 channel 8 for Antarctic granules between September 2002 and May 2006. We found excellent agreement with MODIS (at the 0.2 K level) over the full emperature range in data from early in the Aqua mission. However, in more recent data, starting in April 2005, we found a scene temperature dependence in MODIS-AIRS brightness temperature differences, with a discrepancy of 1- 1.5 K at 200 K. The comparison between AIRS and HIRS/3 (channel 8) on NOAA 16 for the same time period yields excellent agreement. The cause and time dependence of the disagreement with MODIS is under evaluation, but the change was coincident with a change in the MODIS production software from collection 4 to 5.
Document ID
20070017413
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Broberg, Steven E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Aumann, Hartmut H.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Gregorich, David T.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Xiong, X.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 23, 2013
Publication Date
August 13, 2006
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: SPIE Earth Observing Systems XI
Location: San Diego, CA
Country: United States
Start Date: August 14, 2006
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Other
Keywords
MODIS
validation
radiometers
spectrometers
Atmospheric Infrared Sounder (AIRS)
HIRS

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