BackForwardInstrument:  Radiomet 

Instrument details
Acronym Radiomet
Full name Radio-occultation sounder
Purpose Temperature/humidity sounding with highest vertical resolution, space weather
Short description Measuring the phase delay due to refraction during occultation between GPS and LEO
Background Consolidated technology
Scanning Technique Limb scanning from the satellite altitude to close-to-surface by time sampling – Azimuth: 90° sectors fore- and aft-
Resolution About 300 km horizontal, 0.5 km vertical
Coverage / Cycle 2 GNSS constellations tracked. About 750 soundings/day - Average spacing 820 km - Global coverage (300 km spacing) in 7.5 days
Mass Power Data Rate


Providing Agency Roscosmos
Instrument Maturity Backed by strong heritage
Utilization Period: TBD
Last update: 2022-07-18
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
  • Active and radio-occultation sensor
  • GNSS radio-occultation
WIGOS Subcomponents
  • Subcomponent 1
  • GNSS radio occultation (basic constellation)
  • GNSS radio occultation sounder (basic constellation)
Mission objectives
Primary mission objectives
  • Atmospheric temperature
  • Height of the top of PBL
  • Height of the tropopause
  • Specific humidity
  • Temperature of the tropopause
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.