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Instrument: ERM : Earth Radiation Measurement
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Description
Earth's radiation detector is mainly used for detecting the Earth-atmosphere system radiation budget.It does this by 0.2-4.3 µm short wave and 0.2-50 µm full wave the two wide bands channel observation of the Earth system radiation into space, where the main observations of short wave channel gas system reflection of solar radiation, from the full wave channel observation will be deducted reflection of solar radiation is the result of the Earth-atmosphere system-wave radiation.The adoption of the Earth's radiation detector wide-angle sweeping across the narrow field of view and track scan modes on Earth observation, the former provides the global total of radiation budget status, and the latter provides resolution of about 35Km of the Earth's radiation budget distribution of energy.

Narrow field of view scanned channels and the index
Channel 0.2~>3.8μm 0.2~50μm
Field View 2°×2° 2°×2°
Scan area ±50° ±50°
Radiance range 0~370Wm-2Sr-1 0~500Wm-2Sr-1
Calibration accuracy[Note 1] 1% 0.8%
Sensitivity 0.4Wm-2Sr-1 0.4Wm-2Sr-1
Long-term stability in the second year[Note 2] <1% <1%

Wide field of view does not scan the channel and its index
Channel 0.2~>3.8μm 0.2~50μm
Field View 120° 120°
Scan area ±50° ±50°
Radiance range 0~370Wm-2Sr-1 0~500Wm-2Sr-1
Calibration accuracy[Note 1] 1% 0.8%
Sensitivity 0.4Wm-2Sr-1 0.4Wm-2Sr-1
Long-term stability in the second year[Note 2] <1% <1%

[Note 1]:for the first Star [Note 2]:assessment of long-term stability in-orbit

Online Resources
http://satellite.cma.gov.cn/ArssEn/StaticContent/DeviceIntro_FY3_ERM.aspx

Instrument Logistics
Instrument Start Date: 2008-05-29
Instrument Owner: China/NSMC