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TOMS-Earth Probe (Total Ozone Mapping Spectrometer - Earth Probe, TOMS-EP, originally just TOMS, COSPAR 1996-037A) [1] was launched on July 2, 1996, from Vandenberg AFB by a Pegasus XL rocket. The satellite project was originally known as TOMS, back in 1989 when it was selected as a SMEX mission in the Explorer program .
The TOMS was a single Ebert-Fastie spectrometer with a fixed grating and an array of exit slits. The TOMS step-scanned across the orbital track 51° from the nadir in 3° steps with an FOV of approximately 0.052 rad. At each scan position, the Earth radiance was monitored at six wavelengths (0.304, 0.3125, 0.325, 0.3175, 0.3326, and 0.360 ...
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An XPS spectrometer. A spectrometer (/ s p ɛ k ˈ t r ɒ m ɪ t ər /) is a scientific instrument used to separate and measure spectral components of a physical phenomenon. Spectrometer is a broad term often used to describe instruments that measure a continuous variable of a phenomenon where the spectral components are somehow mixed.
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However, estimates of surface UV radiation from satellite data (ozone and cloud cover) started in November 1978 with the launch of Nimbus-7/TOMS (Total Ozone Mapping Spectrometer) followed by Meteor-3/TOMS in 1991, Earth-Probe/TOMS in 1996, and by OMI (Ozone Measuring Instrument on the EOS/AURA spacecraft) in July 2004.
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