Source: https://aura.gsfc.nasa.gov/omi.html
OMI
Aura, NASA
Data Acquisition
https://disc.gsfc.nasa.gov/datasets?keywords=aura&page=1
Key Facts
[if !supportLists]· [endif]OMI is a nadir-viewing wide-field-imaging spectrometer,giving daily global coverage.
[if !supportLists]· [endif]OMI measures the key air quality components such as
nitrogen dioxide(NO2), sulfur dioxide (SO2), bromine oxide(BrO), OClO, and aerosolcharacteristics.
[if !supportLists]· [endif]OMI provides mapping of pollution products from an urbanto super-regional scale.
About OMI
The Ozone MonitoringInstrument (OMI) instrument can distinguish between aerosol types, such assmoke, dust, and sulfates, and measures cloud pressure and coverage, whichprovides data to derive tropospheric ozone.
OMI continues theTOMS record for total ozone and other atmospheric parameters related to ozonechemistry and climate. OMI measurements are highly synergistic with the otherinstruments on the Aura platform.
The OMI instrumentemploys hyperspectral imaging in a push-broom mode to observe solar backscatterradiation in the visible and ultraviolet. The hyperspectral capabilitiesimprove the accuracy and precision of the total ozone amounts and also allowfor accurate radiometric and wavelength self calibration over the long term.
The instrument is acontribution of the Netherlands's Agency for Aerospace Programs (NIVR) incollaboration with the Finnish Meteorological Institute (FMI) to the Auramission.
[if !supportLineBreakNewLine]
[endif]
OMI Instrument Science
OMI derives itsheritage from NASA's Total Ozone Mapping Spectrometer (TOMS) instrument and theEuropean Space Agency (ESA) Global Ozone Monitering Experiment (GOME)instrument (on the ERS-2 satellite). It can measure many more atmosphericconstituents than TOMS and provides much better ground resolution than GOME (13km x 25 km for OMI vs. 40 km x 320 km for GOME).
OMI is a keyinstrument on Aura for monitoring the recovery of the ozone layer in responseto the phase out of chemicals, such as CFCs, agreed to by the nations of theworld in the Montreal protocol and later modifications to it at Copenhagen andLondon.
OMI measurescriteria pollutants such asO3, NO2, SO2, and aerosols. TheUS Environmental Protection Agency (EPA) has designated these atmosphericconstituents as posing serious threats to human health and agriculturalproductivity. These measurements are made at near urban scale resolution andtrack industrial pollution and biomass burning.
OMI detects volcanicash and sulfur dioxide produced in volcanic eruptions with up to at least 100times more sensitivity than TOMS. These measurements are important for aircraftsafety.
OMI measures ozoneprofiles (in the UV) complimentary to those measured by TES and HIRDLS (in theIR) and MLS (in the microwave).
OMI measures BrO,formaldehyde, and OClO which all play a role in chemistry of the stratosphereand troposphere.
OMI measures the
total column amount of atmospheric ozone NO2as well aslower atmospheric dust, smoke, and other aerosols.
OMI Parameters
The instrumentobserves Earth's backscattered radiation with a wide-field telescope feedingtwo imaging grating spectrometers. Each spectrometer employs a CCD detector.
Onboard calibrationincludes a white light source, LEDs, and a multi-surface solar-calibrationdiffuser. A depolarizer removes the polarization from the backscatteredradiation.
Item
Parameter
Visible:
350 - 500 nm
UV:
UV-1, 270 to 314 nm, UV-2 , 306 to380 nm
Spectral resolution:
1.0 - 0.45 nm FWHM
Spectral sampling:
2-3 for FWHM
Telescope FOV:
114 (2600 km on ground)
IFOV:
3 km, binned to 13 x 24 km
Detector:
CCD: 780 x 576 (spectral x spatial)pixels
Mass:
65kg
Duty cycle:
60 minutes on daylight side
Power:
66 watts
Data rate:
0.8 Mbps (average)
