Instrument: GMI (GF-5)
Greenhouse-gases Monitoring Instrument
CO2 and CH4 profiles
4-band NIR/SWIR grating spectrometer [see detailed characteristics below]
Heritage of the Orbiting Carbon Observatory (OCO), flown on OCO-2
Mechanical cross-track scanning. Five cross-track samples at about 150 km distance, along-track sampling at about 130 km distance. Swath about 800 km
10.3 km at the s.s.p.
Coverage / Cycle
Global in 5 days, in daylight
Flown on an R&D satellite
2018 to 2020
SNR @ 30 % albedo
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
Earth observation instrument Passive optical radiometer or spectrometer Cross-nadir shortwave (UV/VIS) sounder
Subcomponent 1 UV/VIS/NIR nadir sounder
Tentative Evaluation of Measurements
The following list indicates which measurements can
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
Variable Relevance for measuring this variable Operational limitations Explanation
CH4 mole fraction 1 - primary Cloud sensitive.. Daylight only. Very-high resolution SWIR spectrometry. CH4 lines around 1.65 micrometers. Specifically designed for CH4.
CO2 mole fraction 1 - primary Cloud sensitive.. Daylight only. Very-high resolution SWIR spectrometry CO2 lines around 1.6 and 2.1 micrometers. Specifically designed for CO2.