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Updates to the Absolute Radiometric Accuracy of the AIRS on Aqua

Show simple item record Pagano, Thomas S. Aumann, Hartmut H. Broberg, Steve Manning, Evan Overoye, Kenneth Weiler, Margaret H. 2020-05-29T06:45:41Z 2020-05-29T06:45:41Z 2018-09-24
dc.identifier.citation SPIE Asia-Pacific Remote Sensing, Honolulu, Hawaii, September 24 - 26, 2018 en_US
dc.identifier.clearanceno 18-4927
dc.description.abstract The Atmospheric Infrared Sounder (AIRS) on the EOS Aqua Spacecraft was launched on May 4, 2002. The AIRS was designed to measure small changes in the global hydro-thermodynamic cycle and has demonstrated exceptional radiometric and spectral stability and accuracy in-orbit. This accuracy is achieved by transferring the calibration from a Large Area Blackbody (LABB) to the On-Board Calibrator (OBC) blackbody during preflight testing. The LABB theoretical emissivity is in excess of 0.9999 and temperature uncertainty is less than 50 mK. The LABB emitted radiance is NIST traceable through thermistors located on the internal surfaces. The AIRS also provides a full aperture space view every scan for offset calibration. AIRS nonlinearity and polarization calibration coefficients were based on pre-flight testing and have been amongst the highest uncertainty sources in the calibration. A recent method using on-board space view data has reduced the uncertainty of the polarization coefficients and use of separate A side and B side data from preflight testing has reduced the uncertainty of the nonlinearity estimates. An update to the system radiometric uncertainty is made based on the new data and is presented in this paper. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2018 en_US
dc.subject AIRS en_US
dc.subject hyperspectral infrared en_US
dc.subject absolute en_US
dc.subject radiometric en_US
dc.subject calibration en_US
dc.title Updates to the Absolute Radiometric Accuracy of the AIRS on Aqua en_US
dc.type Preprint en_US

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