BackForwardInstrument:  GARI 

Instrument details
Acronym GARI
Full name The GAGG Radiation Instruments
Purpose The GAGG Radiation Instruments (GARI) are two identical instruments designed to space-qualify new gamma-ray detector technology for space-based applications.
Short description The combined detectors measure the gamma-ray spectrum over the energy range of 0.02 - 8 MeV. No information was found on resolving power so a value of 15 was assumed.
Background Both GARI instruments are mounted on the International Space Station for 1 year.
Scanning Technique N/A
Coverage / Cycle
Mass Power Data Rate


Providing Agency NRL
Instrument Maturity Demonstration pending
Utilization Period: 2022 to 2023
Last update: 2022-01-04
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
  • Solar and space environment monitors
  • Space radiometer or spectrometer
WIGOS Subcomponents
  • Subcomponent 3
  • UV spectral imagery (e.g. GEO, HEO, MEO, LEO)
  • Gamma-ray spectrometer [from GEO, HEO, MEO, LEO]
Mission objectives
Primary mission objectives
  • Gamma-ray flux spectrum
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
Gamma-ray flux spectrum*4 - fairNo specific limitation.Interplanetary space viewing