BackForwardInstrument:  ST/1 

Instrument details
Acronym ST/1
Full name Gamma-ray spectrometer
Purpose Monitoring of Gamma and X-ray radiation
Short description Description not available. Presumably, spectrometer for the range 0.2-10 Mev
Background Part of the instrument package carried by the 4 sunsynchronous satellites of the 5-satellite Ionozonde constellation
Scanning Technique Interplanetary space observation from a constellation of 4 sunsynchronous satellites
Resolution N/A
Coverage / Cycle Full interplanetary space in 25 min (orbital period) with 4 satellites. Sampling at 1 s intervals
Mass Power Data Rate


Providing Agency Roscosmos
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2024 to 2027
Last update: 2021-10-02
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
  • 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]
  • X-ray spectrometer [from GEO, HEO, MEO, LEO]
Mission objectives
Primary mission objectives
  • Gamma-ray flux spectrum
  • X-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*3 - highNo specific limitation.Interplanetary space viewing, extending into the X-ray field
X-ray flux spectrum*2 - very highNo specific limitation.Interplanetary space viewing, coarse spectral resolution, extending into the gamma-ray field