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7 January 2004 NGST longwave hyperspectral imaging spectrometer system characterization and calibration
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Abstract
Northrop Grumman Space Technology (NGST) has developed and tested a Long-wave Hyperspectral Imaging Spectrometer (LWHIS) that operates in the 8 to 12.5 micron band. An overview of the system design has been described elsewhere. This paper describes the system characterization and radiometric calibration of this instrument using NGST’s Long-wave Hyperspectral Test Facility which uses a 1375K globar source assembly, a monochromator, a collimator and a fine pointing mirror to provide image quality and FPA alignment data. Image quality characterization results presented here include measurement of the instrument’s Modulation Transfer Function (MTF), spatial co-registration of spectral channels (spectral smile), cross-track spectral error (spatial smile), and spectral calibration. Radiometric calibration results for laboratory targets are also presented.
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Karen E Yokoyama, Harold Miller Jr., Ted Hedman, Sveinn Thordarson, Miguel Figueroa, John Shepanski, Peter J. Jarecke, and Steven Lai "NGST longwave hyperspectral imaging spectrometer system characterization and calibration", Proc. SPIE 5159, Imaging Spectrometry IX, (7 January 2004); https://doi.org/10.1117/12.505840
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