Conceptual design of the CIRAS payload and spacecraft. The CIRAS payload includes a scan mirror capable of rotating 360ยบ to view Earth and an internal blackbody for calibration, as well as a 3-element, all-refractive telescope. Light collected by the telescope is focused onto the entrance slit of an all-refractive MWIR grating spectrometer, with performance expected to be comparable to the existing large-satellite AIRS mission payload. Image: NASA. |
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