Full Name Global Positioning Satellite Occultation Experiment (GOX) Status No longer operational
Instrument Agencies NASA, NSPO, JPL, UCAR Maturity
Instrument Type Atmospheric temperature and humidity sounders Geometry Occultation
Instrument Technology GNSS radio-occultation receiver Sampling Other
Data Access Open Access Data Format ASCII
Measurements and Applications Each instrument equipped with 4 GPS antennas to receive the L1 and L2 radio wave signals transmitted from the 24 US GPS satellites. Based on the signal transmission delay caused by the electric density, temperature, pressure, and water content in the iono
Resolution Summary Vertical: 0.3 - 1.5 m; Horizontal: 300 - 600 km
Swath Summary
Accuracy Summary
Waveband Summary L1/L2
MW (~0.1 cm - ~100 cm)
Instrument Measurements
Measurements Overview
Atmospheric Humidity FieldsAtmospheric specific humidity (column/profile)
Atmospheric Temperature FieldsAtmospheric temperature (column/profile)
Thematic Links Global Climate Observing System Essential Climate Variables (GCOS ECVs)
ECVDescriptionProduct(s)ECV Inventory 3.0 Record(s)
Temperature (upper-air) click here click here search ECV Inventory records
Water Vapour (upper air) click here click here search ECV Inventory records
Instrument Missions
COSMIC-1 FM3 - COSMIC-1 FM3 (2006 - 2010)
COSMIC-1 FM2 - COSMIC-1 FM2 (2006 - 2018)
COSMIC-1 FM4 - COSMIC-1 FM4 (2006 - 2018)
COSMIC-1 FM5 - COSMIC-1 FM5 (2006 - 2018)
COSMIC-1 FM1 - COSMIC-1 FM1 (2006 - 2020)
COSMIC-1 FM6 - COSMIC-1 FM6 (2006 - 2020)