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Instrument details
Acronym
OSIRIS
Full name
Optical Spectrograph and Infra-Red Imaging System
Purpose
Atmospheric chemistry. Tracked species: ClO, NO, NO2, O3, OClO and aerosol
Short description
UV/VIS/NIR spectrometer, spectral range 280-800 nm, spectral resolution 1 nm. Supported by a NIR/SWIR radiometer with three channels (1.26 µm, 1.27 µm and 1.52 µm) of 10 nm bandwidth
Background
New development
Scanning Technique
Limb scanning
Resolution
Vertical: 1 km, in the altitude range 5-100 km; horizontal effective resolution: ~ 300 km (limb geometry)
Coverage / Cycle
Global coverage in 3 days for cells of 300 km side
Mass
Power
Data Rate
Providing Agency
SNSA
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
2001 to ≥2022
Last update:
2021-11-27
Detailed characteristics
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
Instrument classification
Earth observation instrument Limb sounders Limb sounder
WIGOS Subcomponents
Subcomponent 1 UV/VIS/NIR scanning limb sounder Subcomponent 2 UV/VIS/NIR/IR occultation limb sounder
Mission objectives
Primary mission objectives
Secondary mission objectives Aerosol mass mixing ratio Aerosol volcanic ash PSC occurrence Opportunity objectives Atmospheric temperature Specific humidity Show all Show fewer
Tentative 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
Variable Relevance for measuring this variable Operational limitations Explanation
Aerosol mass mixing ratio 5 - marginal Limited to high atmosphere.. Daylight only. UV, VIS, NIR spectrometry
Atmospheric temperature 4 - fair Limited to high atmosphere.. Daylight only. UV, VIS and NIR spectrometry.
BrO 3 - high Limited to high atmosphere.. Daylight only. UV spectrometry. BrO lines around 300 nm. Limb sounding mechanically or electronically
HCHO 3 - high Limited to high atmosphere.. Daylight only. UV spectrometry. HCHO lines around 350 nm. Limb sounding mechanically or electronically
ClO 3 - high Limited to high atmosphere.. Daylight only. UV Spectrometry. ClO lines around 300 nm.
NO 4 - fair Limited to high atmosphere.. Daylight only. UV spectrometry. NO lines around 250 nm.
NO2 4 - fair Limited to high atmosphere.. Daylight only. UV and VIS spectrometry. Several lines in the ranges around 220 nm and 400 nm.
O3 4 - fair Limited to high atmosphere.. 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 4 - fair Limited to high atmosphere.. Daylight only. UV and VIS spectrometry.
SO2 4 - fair Limited to high atmosphere.. Daylight only. UV spectrometry. SO2 lines around 350 nm.
Specific humidity 4 - fair Limited to high atmosphere.. Daylight only. UV, VIS and NIR spectrometry with several water vapour bands (main: around 940 nm).
Aerosol volcanic ash 5 - marginal Limited to high atmosphere.. Daylight only. UV, VIS and NIR spectrometry;
Instrument: OSIRIS