Share Email Print
cover

Proceedings Paper

Performance verification of the Geosynchronous Imaging Fourier Transform Spectrometer (GIFTS) on-board blackbody calibration system
Author(s): Fred A. Best; Henry E. Revercomb; David C. Tobin; Robert O. Knuteson; Joseph K. Taylor; Donald J. Thielman; Douglas P. Adler; Mark W. Werner; Scott D. Ellington; John D. Elwell; Deron K. Scott; Gregory W. Cantwell; Gail E. Bingham; William L. Smith
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The NASA New Millennium Program's Geosynchronous Imaging Fourier Transform Spectrometer (GIFTS) instrument was designed to provide enormous advances in water vapor, wind, temperature, and trace gas profiling from geostationary orbit. The top-level instrument calibration requirement is to measure brightness temperature to better than 1 K (3 sigma) over a broad range of atmospheric brightness temperatures, with a reproducibility of ±0.2 K. For the onboard calibration approach used by GIFTS that employs two internal blackbody sources (290 K and 255 K) plus a space view sequenced at regular programmable intervals, this instrument level requirement places tight requirements on the blackbody temperature uncertainty (0.1 K) and emissivity uncertainty (0.001). The blackbody references are cavities that follow the UW Atmospheric Emitted Radiance Interferometer (AERI) design, scaled to the GIFTS beam size. The engineering model blackbody system was completed and fully calibrated at the University of Wisconsin and delivered for integration into the GIFTS Engineering Development Unit (EDU) at the Utah State Space Dynamics Laboratory. This paper presents a detailed description of the methodology used to establish the required temperature and emissivity performance, with emphasis on the traceability to NIST standards. In addition, blackbody temperature data are presented from the GIFTS EDU thermal vacuum tests that indicate excellent temperature stability. The delivered on-board blackbody calibration system exceeds performance goals - the cavity spectral emissivity is better than 0.998 with an absolute uncertainty of less than 0.001, and the absolute blackbody temperature uncertainty is better than 0.06 K.

Paper Details

Date Published: 22 December 2006
PDF: 10 pages
Proc. SPIE 6405, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications, 64050I (22 December 2006); doi: 10.1117/12.698021
Show Author Affiliations
Fred A. Best, Univ. of Wisconsin, Madison (United States)
Henry E. Revercomb, Univ. of Wisconsin, Madison (United States)
David C. Tobin, Univ. of Wisconsin, Madison (United States)
Robert O. Knuteson, Univ. of Wisconsin, Madison (United States)
Joseph K. Taylor, Univ. of Wisconsin, Madison (United States)
Donald J. Thielman, Univ. of Wisconsin, Madison (United States)
Douglas P. Adler, Univ. of Wisconsin, Madison (United States)
Mark W. Werner, Univ. of Wisconsin, Madison (United States)
Scott D. Ellington, Univ. of Wisconsin, Madison (United States)
John D. Elwell, Utah State Univ. (United States)
Deron K. Scott, Utah State Univ. (United States)
Gregory W. Cantwell, Utah State Univ. (United States)
Gail E. Bingham, Utah State Univ. (United States)
William L. Smith, Hampton Univ. (United States)


Published in SPIE Proceedings Vol. 6405:
Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications
William L. Smith Sr.; Allen M. Larar; Tadao Aoki; Ram Rattan, Editor(s)

© SPIE. Terms of Use
Back to Top