HYDROGNSS-1

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10-day predictions

NORAD ID: 66762

Int'l Code: 2025-276DA

Perigee: 531.2 km

Apogee: 547.7 km

Inclination: 97.4 °

Period: 95.3 minutes

Semi major axis: 6910 km

RCS: Unknown

Launch date: November 28, 2025
Source: European Space Agency (ESA)
Launch site: AIR FORCE WESTERN TEST RANGE (AFWTR)

HYDROGNSS-1 is a small LEO satellite mission that uses GNSS?reflectometry (measuring signals from GPS/GLONASS/Galileo after they reflect off the Earth) to demonstrate and retrieve hydrological information (surface water extent, flood mapping, soil moisture and related parameters). It is a technology/demonstration small satellite (CubeSat/smallsat class) flown to test GNSS?R techniques for operational hydrology applications.

1 66762U 25276DA  26137.61342938  .00001871  00000-0  11476-3 0  9993
2 66762  97.4211 211.0077 0011927 149.4092 210.7836 15.11279861 25735

Source of the keplerian elements: AFSPC