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Instrument details
Acronym
ERM-1
Full name
Earth Radiation Measurement - 1
Purpose
Earth radiation budget
Short description
Two channels. Two units, one scanning, one non-scanning [see detailed characteristics below]
Background
New development. Operations on FY-3A stopped in 2009. Operations on FY-3B stopped in 2011
Scanning Technique
Scanner: swath 2300 km; cross-track scanning,151 steps of 28 km s.s.p. every 4 s; non-scanning: 120 degrees viewing angle (2200 km), 8 samples every 4 s.
Resolution
Scanner: 28 km
Coverage / Cycle
Global coverage twice/day (total radiance) or once/day (short-wave)
Mass
37 kg
Power
40 W
Data Rate
2.6 kbps
Providing Agency
CMA
Instrument Maturity
Flown on operational programme
Utilization Period:
2008 to 2010
Last update:
2021-06-02
Detailed characteristics
Channel Spectral interval Noise Equivalent Radiance Absolute accuracy SNR
Short-wave (outgoing)
0.2 - 3.8 µm
0.4 W m-2 sr-1
1.5 W m-2 sr-1
900
Total radiance (outgoing)
0.2 - 50 µm
0.4 W m-2 sr-1
1.1 W m-2 sr-1
1250
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 Broadband Earth radiation radiometer
WIGOS Subcomponents
Subcomponent 1 Broadband radiometer (for ERB)
Mission objectives
Primary mission objectives Upward long-wave irradiance at TOA Upward short-wave irradiance at TOA Show all Show fewer
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: ERM-1