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Atmospheric emission spectra, see Figure 1, were obtained with the zenith viewing AERI (Revercomb et al., 1993), which was derived from the HIS aircraft instrument (Smith et al., 1996). The AERI is based on an infrared atmospheric spectrometer developed at the UW utilizing a commercial BOMEM Inc. (Quebec, Canada) M100 Michelson interferometer. A pair of blackbody sources, ambient and hot, serve as calibration references. Data acquisition and system control is achieved with a dedicated PC, which transfers raw data to a second PC for processing and storage. The system is set in a thermally isolated environment to facilitate data acquisition over an extreme atmospheric temperature range. Figure 8 is a photograph of the AERI system.
Figure 8: AERI-00 prototype: where the
cylindrical objects are
the hot and ambient blackbodies, and the motor to the left moves the
scanning mirror. The box labeled `Bomem' is the commercial Michelson
interferometer. A PC controlled data acquisition system resides in the
enclosure beneath the instrument. Data is transferred to a second PC
for processing and storage after each radiance measurement.