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Proceedings Paper

Modeled vs. actual performance of the geosynchronous imaging Fourier transform spectrometer (GIFTS)
Author(s): Gregory W. Cantwell; John D. Elwell; Roy W. Esplin; Mark P. Esplin; Deron K. Scott; Lorin J. Zollinger; Gail E. Bingham; Henry E. Revercomb; William L. Smith; Robert A. Reisse
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Paper Abstract

The NASA Geosynchronous Imaging Fourier Transform Spectrometer (GIFTS) has been completed as an Engineering Demonstration Unit (EDU) and has recently finished thermal vacuum testing and calibration. The GIFTS EDU was designed to demonstrate new and emerging sensor and data processing technologies with the goal of making revolutionary improvements in meteorological observational capability and forecasting accuracy. The GIFTS EDU includes a cooled (150 K), imaging FTS designed to provide the radiometric accuracy and atmospheric sounding precision required to meet the next generation GOES sounder requirements. This paper discusses a GIFTS sensor response model and its validation during thermal vacuum testing and calibration. The GIFTS sensor response model presented here is a component-based simulation written in IDL with the model component characteristics updated as actual hardware has become available. We discuss our calibration approach, calibration hardware used, and preliminary system performance, including NESR, spectral radiance responsivity, and instrument line shape. A comparison of the model predictions and hardware performance provides useful insight into the fidelity of the design approach.

Paper Details

Date Published: 8 September 2006
PDF: 10 pages
Proc. SPIE 6297, Infrared Spaceborne Remote Sensing XIV, 62970T (8 September 2006); doi: 10.1117/12.684136
Show Author Affiliations
Gregory W. Cantwell, Utah State Univ. (United States)
John D. Elwell, Utah State Univ. (United States)
Roy W. Esplin, Utah State Univ. (United States)
Mark P. Esplin, Utah State Univ. (United States)
Deron K. Scott, Utah State Univ. (United States)
Lorin J. Zollinger, Utah State Univ. (United States)
Gail E. Bingham, Utah State Univ. (United States)
Henry E. Revercomb, Univ. of Wisconsin/Madison (United States)
William L. Smith, Hampton Univ. (United States)
Univ. of Wisconsin/Madison (United States)
Robert A. Reisse, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 6297:
Infrared Spaceborne Remote Sensing XIV
Marija Strojnik, Editor(s)

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