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Instrument details
Acronym
SIM-1
Full name
Solar Irradiance Monitor - 1
Purpose
Total solar irradiance
Short description
Three cavity radiometers. Spectral range: 0.2-50 µm, Noise Equivalent Radiance 0.2 W m-2 sr-1, absolute accuracy 0.5 %
Background
New development
Scanning Technique
Viewing the Sun when the satellite is in the north pole area (no tracking)
Resolution
N/A (sun pointing)
Coverage / Cycle
One measurement sequence on each orbit; thus 100 min
Mass
14.7 kg
Power
9.5 W
Data Rate
16 kbps
Providing Agency
CMA
Instrument Maturity
Flown on operational programme
Utilization Period:
2008 to 2015-01-05
Last update:
2021-06-02
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 Absolutely calibrated broadband radiometers, and TSI and SSI radiometers
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 2 - very high No specific limitation. TSI over the range from UV to FIR
Instrument: SIM-1