@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix grg: . @prefix iop: . @prefix ns0: . @prefix ns1: . @prefix owl: . @prefix pav: . @prefix prov: . @prefix puv: . @prefix qudt: . @prefix rdf: . @prefix rdfs: . @prefix reg: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . skos:member . skos:narrower . skos:altLabel "ACE-FTS" , "ACE-FTS"@en ; skos:broader ; skos: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"@en ; skos:inScheme ; skos:notation "SDN:L22::TOOL1062" ; skos:note "accepted"@en ; skos:prefLabel "Atmospheric Chemistry Experiment - Fourier Transform Spectrometer"@en . skos:narrower .