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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 ≥2026
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
Instrument: SIM-2