An optical air data sensor system , comprising: a laser source for outputting laser light to be scattered by molecules and aerosols in the atmosphere being scanned; a collecting optics assembly for receiving the scattered laser light including an input optical fiber ; and an interferometer including: a plurality of beam splitters operatively positioned to split the inputted scattered laser light from the input optical fiber into a plurality of scattered light emissions, collimating optics configured to collimate each of the plurality of scattered light emissions, a plurality of Fabry-Perot etalons each operatively configured to receive a corresponding one of the plurality of collimated light emissions, a plurality of imaging optics operatively configured to receive a corresponding one of plurality of collimated light emissions from the plurality of Fabry-Perot etalons and to image the plurality of collimated light emissions onto corresponding ones of a plurality of nonimaging detectors. characterized in that each of the plurality of Fabry-Perot etalons is configured with a center frequency different from a center frequency of all others of the plurality of Fabry-Perot etalons . a laser source for outputting laser light to be scattered by molecules and aerosols in the atmosphere being scanned; a collecting optics assembly for receiving the scattered laser light including an input optical fiber ; and an interferometer including: a plurality of beam splitters operatively positioned to split the inputted scattered laser light from the input optical fiber into a plurality of scattered light emissions, collimating optics configured to collimate each of the plurality of scattered light emissions, a plurality of Fabry-Perot etalons each operatively configured to receive a corresponding one of the plurality of collimated light emissions, a plurality of imaging optics operatively configured to receive a corresponding one of plurality of collimated light emissions from the plurality of Fabry-Perot etalons and to image the plurality of collimated light emissions onto corresponding ones of a plurality of nonimaging detectors. characterized in that each of the plurality of Fabry-Perot etalons is configured with a center frequency different from a center frequency of all others of the plurality of Fabry-Perot etalons . a plurality of beam splitters operatively positioned to split the inputted scattered laser light from the input optical fiber into a plurality of scattered light emissions, collimating optics configured to collimate each of the plurality of scattered light emissions, a plurality of Fabry-Perot etalons each operatively configured to receive a corresponding one of the plurality of collimated light emissions, a plurality of imaging optics operatively configured to receive a corresponding one of plurality of collimated light emissions from the plurality of Fabry-Perot etalons and to image the plurality of collimated light emissions onto corresponding ones of a plurality of nonimaging detectors. characterized in that each of the plurality of Fabry-Perot etalons is configured with a center frequency different from a center frequency of all others of the plurality of Fabry-Perot etalons . <EOS>