WMO OSCAR | Details for Instrument OMI

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Instrument: OMI

Instrument details

Acronym	OMI
Full name	Ozone Monitoring Instrument
Purpose	Ozone profile and total-column or gross profile of other species. Tracked species: BrO, NO2, O3, OClO, SO2 and aerosol
Short description	UV/VIS grating imaging spectrometer, three bands, 1560 channels total [see detailed characteristics below] More information here
Background	New development
Scanning Technique	Pushbroom, cross-track swath 2600 km - Zoom mode available, with swath 725 km
Resolution	13 x 24 km2 associated to 2600 km swath, reduced to 36 x 48 km2 for profiles. 13 x 12 km2 in zoom mode
Coverage / Cycle	Global coverage every day, in daylight
Mass	65 kg	Power	66 W	Data Rate	800 kbps

Providing Agency	NIVR
Instrument Maturity	Flown on an R&D satellite
Utilization Period:	2004 to 2025
Last update:	2024-09-30

Detailed characteristics

Spectral range	No. of channels	Spectral resolution	SNR @ specified input spectral radiance
270 - 314 nm	390	0.63 nm	…….. @ ……… W m^-2 sr^-1 μm^-1
306 - 380 nm	390	0.42 nm	…….. @ ……… W m^-2 sr^-1 μm^-1
350 - 500 nm	780	0.63 nm	…….. @ ……… W m^-2 sr^-1 μm^-1

Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Earth Observation System (NASA)
- Aura (see instrument status) Oct 2004 - 2025

Instrument classification

Earth observation instrument
Passive optical radiometer or spectrometer
Cross-nadir shortwave (UV/VIS) sounder

WIGOS Subcomponents

Subcomponent 1
UV/VIS/NIR sounders, nadir and limb
UV/VIS/NIR nadir sounder

Mission objectives

Primary mission objectives

BrO
ClO
H2O
HCHO
HCHO Total Column
NO
NO2
NO2 Total Column
O3
O3 Total Column
SO2
SO2 Total Column

Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
Note: * Primary mission objective.

Search:

Variable	Relevance for measuring this variable	Operational limitations	Explanation
BrO*	1 - primary	Cloud sensitive.. Daylight only.	UV spectrometry. BrO lines around 300 nm
ClO*	1 - primary	Cloud sensitive.. Daylight only.	UV Spectrometry. ClO lines around 300 nm
Aerosol column burden	2 - very high	Cloud sensitive.. Daylight only.	UV (for absorbing aerosol) and VIS spectrometry
Aerosol effective radius	2 - very high	Cloud sensitive.. Daylight only.	UV (for absorbing aerosol) and VIS spectrometry
Aerosol mass mixing ratio	2 - very high	Cloud sensitive.. Daylight only.	UV (for absorbing aerosol) and VIS spectrometry
Aerosol Optical Depth	2 - very high	Cloud sensitive.. Daylight only.	UV (for absorbing aerosol) and VIS spectrometry
Aerosol type	2 - very high	Cloud sensitive.. Daylight only.	UV (for absorbing aerosol) and VIS spectrometry
HCHO*	2 - very high	Cloud sensitive.. Coarse vertical resolution.. Daylight only.	UV spectrometry. HCHO lines around 350 nm
HCHO Total Column*	2 - very high	Cloud sensitive.. Daylight only.	UV spectrometry. HCHO lines around 350 nm
NO*	2 - very high	Cloud sensitive.. Coarse vertical resolution.. Daylight only.	UV spectrometry. NO lines around 250 nm
NO2*	2 - very high	Cloud sensitive.. Coarse vertical resolution.. Daylight only.	UV and VIS spectrometry. Several lines in the ranges around 220 nm and 400 nm
NO2 Total Column*	2 - very high	Cloud sensitive.. Daylight only.	UV and VIS spectrometry. Several NO2 lines
O3*	2 - very high	Cloud sensitive.. Daylight only.	UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis)
O3 Total Column*	2 - very high	Cloud sensitive.. Daylight only.	UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis)
PSC occurrence	2 - very high	Coarse vertical resolution.. Daylight only.	UV and VIS spectrometry
SO2*	2 - very high	Cloud sensitive.. Coarse vertical resolution.. Daylight only.	UV spectrometry. SO2 lines around 350 nm
Aerosol volcanic ash	2 - very high	Cloud sensitive.. Daylight only.	UV (specifically sensitive to ash) and VIS spectrometry
Aerosol volcanic ash Total Column	2 - very high	Cloud sensitive.. Daylight only.	UV (specifically sensitive to ash) and VIS spectrometry
H2O*	3 - high	Cloud sensitive.. Daylight only.	UV and VIS spectrometry. Several weak bands
SO2 Total Column*	3 - high	Cloud sensitive.. Daylight only.	UV spectrometry. SO2 lines around 350 nm
Upward short-wave irradiance at TOA	3 - high	Spectral interpolation needed.. Information on BRDF needed.	UV and VIS spectrometry
Cloud cover	5 - marginal	Daylight only.	VIS spectroscopy
Cloud optical depth	5 - marginal	Low-density cloud only.. Daylight only.	VIS spectrometry
Upward spectral radiance at TOA	5 - marginal	Missing NIR, SWIR and all Long-waves.	UV and VIS spectrometry

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