
Proceedings Paper
Performance stability of the Clouds and Earth's Radiant Energy System (CERES) instrument sensors on board the Aqua and Terra spacecraftFormat | Member Price | Non-Member Price |
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Paper Abstract
The Clouds and Earth’s Radiant Energy System (CERES) instruments measure the earth-reflected shortwave energy as
well as the earth-emitted thermal energy, which are two components of the earth’s energy budget. These measurements
are made through four instruments on two spacecraft as part of the Earth Observing System (EOS) mission - Flight
Models 1 and 2 onboard the Terra spacecraft, and Flight Models 3 and 4 onboard the Aqua spacecraft. Each instrument
comprises of three sensors that measure the radiances in different spectral regions- a shortwave channel that measures
energy in the 0.3 to 5 micron wavelength band, a total channel that measures all the incident energy (0.3- <100 microns)
and a window channel that measures the water-vapor window region of 8 to 12 microns. The required accuracy of the
CERES sensors is achieved through pre-launch ground-based calibrations as well as on-orbit calibration activities. Onorbit
calibration is carried out using the Internal Calibration Module (ICM) that consists of a quartz-halogen tungsten
lamp, blackbodies, and a solar diffuser plate known as the Mirror Attenuator Mosaic (MAM). The ICM calibration
provides information about the change in the CERES sensors’ broadband radiometric gains on-orbit from the pre-launch
values. Several validation studies are conducted in order to monitor the behavior of the instruments in various spectral
bands. The CERES Edition-3 data products incorporate the latest upgrades to the calibration techniques. In this paper,
we present the on-orbit performance stability as well as some validation studies using the CERES Edition-3 data
products from all four instruments.
Paper Details
Date Published: 15 October 2012
PDF: 12 pages
Proc. SPIE 8510, Earth Observing Systems XVII, 851004 (15 October 2012); doi: 10.1117/12.930027
Published in SPIE Proceedings Vol. 8510:
Earth Observing Systems XVII
James J. Butler; Xiaoxiong Xiong; Xingfa Gu, Editor(s)
PDF: 12 pages
Proc. SPIE 8510, Earth Observing Systems XVII, 851004 (15 October 2012); doi: 10.1117/12.930027
Show Author Affiliations
Mohan Shankar, Science Systems and Applications, Inc. (United States)
Kory Priestley, NASA Langley Research Ctr. (United States)
Susan Thomas, Science Systems and Applications, Inc. (United States)
Kory Priestley, NASA Langley Research Ctr. (United States)
Susan Thomas, Science Systems and Applications, Inc. (United States)
Phillip Hess, Science Systems and Applications, Inc. (United States)
Dale Walikainen, Science Systems and Applications, Inc. (United States)
Dale Walikainen, Science Systems and Applications, Inc. (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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