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Instrument details
Acronym
SIM-2
Full name
Solar Irradiance Monitor - 2
Purpose
Total solar irradiance
Short description
Three cavity radiometers. Spectral range: 0.2-20 µm, Noise Equivalent Radiance 0.2 W m-2 sr-1, absolute accuracy 0.5 %
Background
Evolution of SIM-1 on FY-3A and FY-3B
Scanning Technique
Tracking the Sun during orbital motion
Resolution
N/A (sun pointing)
Coverage / Cycle
One measurement sequence on each orbit; thus 100 min
Mass
Power
Data Rate
Providing Agency
CMA
Instrument Maturity
Backed by strong heritage
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
Instrument: SIM-2