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- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d definition "The Polar Radiant Energy in the Far-Infrared Experiment (PREFIRE) consists of two 6U CubeSats that each host a Thermal Infrared Spectrometer (TIRS) instrument. The CubeSats are scheduled for launch in March and October of 2023. The purpose of the TIRS instrument is to make spectrally resolved measurements of the Earth’s thermal radiation from the top of the atmosphere. PREFIRE will document, for the first time, variability in spectral fluxes from 4 to 54 microns on hourly to seasonal timescales. The primary mission is 12 months in a polar orbit with inclination of 82 to 98 at altitudes between 450 km and 650 km. The TIRS instrument is an Offner spectrometer that uses a thermopile detector array and a Schwarzchild telescope. In addition, there is a scan mirror which is periodically actuated for calibration. The instrument concept of operation is to collect radiation emitted towards zenith in a nadir sounding orientation with periodic internal and space calibrations. The TIRS thermal control architecture consists of entirely passive elements. The instrument requires all elements be maintained between 0 C and 50 C during operation for the duration of the mission. An overview of the overall thermal control design approach is presented." @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d id "1656173" @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_id 055a79c7-61db-4250-abad-f1e09909f14c @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_id 2e38423f-a5e6-411a-88d3-8fdc00aaf30a @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_id 4f81c61c-f100-4bc4-9664-d9b70d2f162f @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_id 6015ef7b-f3bd-49e1-9193-cc23db566b69 @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_id b2140059-b3ca-415c-b0a7-3e142783ffe8 @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_label "Earth Remote Sensing Instruments" @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_label "Instruments" @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_label "Passive Remote Sensing" @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_label "Spectrometers" @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d path_label "Spectrometers/Radiometers" @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d prefLabel "TIRS-PREFIRE" @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d reference "https://ntrs.nasa.gov/citations/20230005734" @default.
- 5c10ecbc-ca56-4f5e-bfa8-8a16fb68d82d tag "Instruments" @default.