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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:
2021-06-23
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 (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 2 - very high No specific limitation. TSI over the range from UV to FIR
Instrument: SIM-1