HydroGNSS Mission

Objectives and Applications

This Scout mission, HydroGNSS, will provide measurements of key hydrological climate variables, including soil moisture, freeze–thaw state over permafrost, inundation and wetlands, and above-ground biomass, using a technique called Global Navigation Satellite System (GNSS) reflectometry. In doing so it will complement missions such as ESA’s SMOS and Biomass, Copernicus Sentinel-1 and NASA’s SMAP. Knowledge of these variables helps scientists understand climate change and contributes towards weather modelling, ecology mapping, agricultural planning and flood preparedness.

Mission Summary

Full Name
HydroGNSS-A and -B
aka Scout-2
Mission Status
Approved
Mission Agencies
Launch Date
Oct 2025
Mission Links
EOL Date
Dec 2031
EO Portal Info

Orbit Details

Orbit Type
Sun-synchronous
Orbit Period
95.6 minutes
Orbit Sense
Ascending
Orbit Inclination
98.7 deg
Orbit Altitude
550 km
Orbit Longitude
Orbit LST
10:30
Repeat Cycle
30 days
NORAD Catalog #
International Designator

Mission Instruments

SGR-ReSI-Z - Space GNSS Receiver - Remote Sensing Instrument (Zynq based)

Mission Measurements

CategoryParameterInstrument(s)
LandSoil moisture SGR-ReSI-Z
Vegetation SGR-ReSI-Z
OceanOcean surface winds SGR-ReSI-Z
Ocean wave height and spectrum SGR-ReSI-Z
Snow & IceSea ice cover, edge and thickness SGR-ReSI-Z

OpenSearch Datasets

No IDN OpenSearch datasets found.