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The Compact Hyperspectral Infrared Sounding Interferometer (Chisi) Weather Satellite Constellation

Infrared Sounding of moisture and temperature profiles from space is a key measurement required for weather forecasting, however current satellites are not scalable to a large constellation due to their high cost. The Compact Hyperspectral Infrared Sounding Interferometer (CHISI) is a new low-cost field-widened interferometer satellite which is compatible with EELV Secondary Payload Adaptor form factor, thus is scalable to lower cost SmallSats and launch. A constellation of 14 CHISI satellites with Optical Crosslinks will achieve a 1-hour revisit time and $< 5$ minute latency, thus enabling improved forecast sensitivity observations impact.