Journal of Remote Sensing / 2022 / Article / Tab 9

Review Article

An Introduction to the Chinese High-Resolution Earth Observation System: Gaofen-1~7 Civilian Satellites

Table 9

Information of the GMI [7].

SpecificationsValues
Band 1Band 2Band 3Band 4

Detected gasO2CO2CH4CO2
Band range (μm)0.759-0.7691.568-1.5831.642-1.6582.043-2.058
Spectral resolution (cm-1)0.60.27
SNR ()300250
Radiometric calibrationAbsolute accuracy: 5%, relative accuracy: 2%
FOV14.6 mrad (10.3 km@705 km)
ScanCross-track (±35 deg), along track (±20 deg)
Observation modesNadir: 1, 5, 7, 9 points (default mode is 5 points); sun glint; calibration
Number of detector pixels
Zero optical path difference pixel51223523575
Sampling formSymmetricAsymmetricAsymmetricAsymmetric