BackForwardInstrument:  GLM 

Instrument details
Acronym GLM
Full name Geostationary Lightning Mapper
Purpose Proxy for convective precipitation, proxy for NOx generation, study of Earth electric field
Short description CCD camera operating at 777.4 nm (O2) to count flashes and measure their intensity
Background New development
Scanning Technique Electronic, 3-axis stabilised satellite, single detector matrix
Resolution 8 km s.s.p.
Coverage / Cycle Large fraction of the disk continuously observed (time resolution 2 ms)
Mass 65 kg Power 260 W Data Rate 5.5 Mbps


Providing Agency NOAA
Instrument Maturity Demonstrated by simulations
Utilization Period: 2017 to 2035
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
  • Lightning imager
WIGOS Subcomponents
  • Subcomponent 1
  • Lightning mappers [in GEO]
  • Lightning mapper [in GEO]
Mission objectives
Primary mission objectives
  • Total lightning density
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
Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Total lightning density*1 - primaryNo specific limitation.NIR channel. Continuous monitoring