Concept
Atmospheric Chemistry Experiment - Fourier Transform Spectrometer
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1062/1/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | ACE-FTS | ||
| Definition | An infrared Fourier Transform Spectrometer, designed to perform solar occultation measurements to infer the chemical composition of the atmosphere at high latitudes and high altitudes. The spectrometer is composed of a Michelson interferometer with two cube corners and a visible/near infrared imager with two filtered channels. A pointing mirror tracks the Sun's centre as a movable mirror inside the instrument generates an interferogram from the incoming radiation, which is then converted to a spectrum through Fourier transform. The instrument operates using the solar occultation technique, thus carrying out measurements of the Sun-emitted radiation during the short time span at which it travels tangent to the Earth's surface through the atmosphere at sunrise and sunset. The instrument on SCISAT-1 captures approximately 30 occultations per day, as determined by the satellite's polar orbit. The spatial resolution is 1-2 km (vertical), and 500 km (horizontal). The spectral range is (2.2 - 13.3) um, equivalent to (750 - 4400) cm^-1; the spectral resolution is 0.02 cm^-1. The FTS has a circular field of view is 1.25 mrad. The imager within the instrument has two filtered channels at 0.525 um and 1.02 um respectively, and a total field of view of 30 mrad.Flown on SCISAT-1. http://www.wmo-sat.info/oscar/instruments/view/6 | ||
| Date | 2016-11-15T15:28:05 | ||
| Identifier | SDN:L22::TOOL1062 | ||
| Note | accepted | ||
| Is Version Of | TOOL1062 | ||
| version | 1 | ||
| Broader | L05:314 |
Atmospheric chemistry remote sensors | |
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