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10 November 2003 Test measurements with the ACE FTS instrument using gases in a cell
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The SciSat-1 satellite will primarily function in occultation mode; however, during the dark portion of the orbit the Earth will pass between the sun and the satellite. This configuration will give rise to the opportunity of acquiring some nadir-view FTIR spectra of the Earth. Since the ACE FTS was designed to view a hot source (i.e., the Sun) at high resolution using a single scan, it is necessary to determine if the FTS will provide nadir spectra of the relatively cold atmosphere and surface with a sufficient signal-to-noise ratio. Hence, preliminary tests were performed on the ACE FTS instrument using a background source that provided a radiative contrast of about 100 K with the gas in a cell, thereby approximately simulating the atmospheric temperature conditions of the Earth. Methane, ozone and carbon monoxide gases were used in the cell for the purpose of determining the measurement characteristics of the ACE FTS instrument with respect to the nadir radiation emanating from the planet’s surface and atmosphere over most of the thermal infrared region. The signal-to-noise ratio from the laboratory test measurements is used to estimate the error on column measurements of carbon monoxide and other gases.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eldon Puckrin, Wayne F. Evans, Chris Ferguson, Kaley A. Walker, and Denis Dufour "Test measurements with the ACE FTS instrument using gases in a cell", Proc. SPIE 5151, Earth Observing Systems VIII, (10 November 2003);

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