BackForwardInstrument:  IGOR (TacSat-2) 

Instrument details
Acronym IGOR (TacSat-2)
Full name Integrated GPS Occultation Receiver
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 1 GNSS constellation tracked. About 500 soundings/day - Average spacing 1000 km - Global coverage (300 km spacing) in 10 days
Mass 4.6 kg Power 16 W Data Rate 17 kbps

 

Providing Agency NASA
Instrument Maturity Flown on operational programme
Utilization Period: 2007 to 2007
Last update: 2019-01-01
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