Skylab S191 visible-infrared spectrometer.
The Skylab Earth Resources Experiment Package included a manually pointed spectrometer (S191), which provided reflective (0.4-2.5-microm) and thermal emissive (6-15-microm) spectra of areas 500 m in diameter on the earth below Skylab. The instrument is described, and the quality of data obtained in the Skylab mission is discussed in detail.
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