Concept
Ozone Monitoring Instrument
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1039/1/ | |
|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | |
| Alternative Labels | OMI | |
| Definition | The Ozone Monitoring Instrument (OMI) is a cross-nadir scanning sounder which follows on from NASA's Total Ozone Mapping Spectrometer (TOMS). OMI is designed to monitor recovery of the ozone layer by measuring different aerosols (smoke, dust, sulfates) and other criteria pollutants such as O3 (ozone), NO2 (nitrogen dioxide), BrO (bromine) and chlorine dioxide (OCLO). The OMI observes Earth's solar backscattered radiation in the visible and ultraviolet spectrums with a wide-field telescope, using hyperspectral imaging in a push-broom mode. This feeds two imaging grating spectrometers, each of which employs a charged coupled device (CCD) detector. Onboard calibration includes a white light source, LEDs, and a multi-surface solar-calibration diffuser. A depolariser removes the polarisation from the backscattered radiation. The OMI has a 13 x 24 km spatial resolution which can be zoomed to 13 x 13 km for detecting and tracking urban-scale pollution sources. The OMI employs three spectral bands, with wavelengths detected in the visible spectrum from 350 - 500 nm (band 1) and wavelengths detected in the ultraviolet spectrum from 270 - 314 nm (band 2) and 306 - 380 nm (band 3). In total there are 1560 channels across the tree bands. The overall spectral resolution of the OMI is from 0.45 -1.0 nm for full width at half maximum (FWHM). http://www.wmo-sat.info/oscar/instruments/view/377 | |
| Date | None | |
| Identifier | TOOL1039 | |
| Note | accepted | |
| Is Version Of | TOOL1039 | |
| version | 1 | |
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