8 February 2001 Calibration of the Geostationary Imaging Fourier Transform Spectrometer (GIFTS)
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Abstract
The NASA New Millennium Program's Geostationary Imaging Fourier Transform Spectrometer (GIFTS) requires highly accurate radiometric and spectral calibration in order to carry out its mission to provide water vapor, wind, temperature, and trace gas profiling from geostationary orbit. A calibration concept has bene developed for the GIFTS Phase A instrument design. The in-flight calibration is performed using views of two on-board blackbody sources along with cold space. A radiometric calibration uncertainty analysis has been developed and used to show that the expected performance for GIFTS exceeds its top level requirement to measure brightness temperature to better than 1 K. For the Phase A GIFTS design, the spectral calibration is established by the highly stable diode laser used as the reference for interferogram sampling, and verified with comparisons to atmospheric calculations.
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Fred A. Best, Henry E. Revercomb, Gail E. Bingham, Robert O. Knuteson, David C. Tobin, Daniel Darch LaPorte, William L. Smith, "Calibration of the Geostationary Imaging Fourier Transform Spectrometer (GIFTS)", Proc. SPIE 4151, Hyperspectral Remote Sensing of the Land and Atmosphere, (8 February 2001); doi: 10.1117/12.417006; https://doi.org/10.1117/12.417006
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