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Instrument details
Acronym
SSIM
Full name
Solar Spectral Irradiance Monitor
Purpose
Spectral solar irradiance in UV/VIS/NIR/SWIR
Short description
Prism spectrometer for spectral irradiance: range 165-1650 nm, split in three bands: 165-320 nm (resolution 1 nm), 285-700 nm (resolution 1 nm) and 650-1650 nm (resolution 8 nm). Absolute accuracy: 3% from 165 to 240 nm and 2% from 240 to 1650 nm.
Background
New development
Scanning Technique
Sun pointing during orbital movement, data sampled every 2 min
Resolution
N/A
Coverage / Cycle
One measurement after integration of all data taken during the orbit; thus 100 min
Mass
Power
Data Rate
Providing Agency
CMA
Instrument Maturity
Flown on operational programme
Utilization Period:
2021 to ≥2027
Last update:
2021-06-23
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 Passive optical radiometer or spectrometer Solar irradiance monitor
WIGOS Subcomponents
Subcomponent 1 TSI and SSI radiometers (for solar irradiance)
Mission objectives
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
Downward short-wave irradiance at TOA 5 - marginal No specific limitation. Spectral irradiance stretching to SWIR
Instrument: SSIM