Subscribe with SteadyHydroGNSS (Earth Scout 2)
HydroGNSS [SSTL]
HydroGNSS the second of ESA's Earth observation Scout missions, will provide measurements of key hydrological climate variables, including soil moisture, freezethaw state over permafrost, inundation and wetlands, and above-ground biomass, using a technique called Global Navigation Satellite System (GNSS) reflectometry.
The mission will will complement missions such as ESAs SMOS and Biomass, Copernicus Sentinel-1 and NASAs SMAP.
The satellite measures the signal reflected off the land, ice and ocean from existing GNSS missions such as Galileo and GPS. Although these signals are faint, they can be collected by a low power receiver that can be accommodated on a small satellite in low Earth orbit making it compatible with a Scout mission.
The industrial consortium consists of Surrey Satellite Technology Ltd (UK) in charge of the development of the complete system, and a consortium of scientific institutes that will develop the retrieval techniques to access these key hydrological climate variable from the reflected signal: the National Oceanography Centre (UK), the Nottingham Geospatial Institute (UK), the University of Rome La Sapienza (IT), the Institute of Space Studies Catalonia (ES), and the Finnish Meteorological Institute (FI).
| Nation: | Europe |
|---|---|
| Type / Application: | Earth Observation |
| Operator: | SSTL, ESA |
| Contractors: | SSTL |
| Equipment: | |
| Configuration: | SSTL-42 (SSTL X50) ? |
| Propulsion: | |
| Power: | Solar cells, batteries |
| Lifetime: | |
| Mass: | 40 kg |
| Orbit: |
| Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
|---|---|---|---|---|---|---|
| HydroGNSS 1 (Earth Scout 2A) | 2025-276DA | 28.11.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with FORMOSAT 8A, W-Series 4, IRIDE-MS1-EAGLET2 1, ..., 8, Nahla, YAM 9, Azalea Cluster 1 RF-1, 2, 3, Pelican 5, 6, ICEYE X58, ..., X62, PIAST M, S1, S2, ŅuSat 47, 51, 52, Umbra-SAR 11, Mercury 1, HydroGNSS 1, 2, ION-SCV 021, 022, LacunaSat 4C, ..., 4F Lemur-2 233, 334, 235, Foresail 1p, LEO Express 3, FossaSat 2E22, 2E23, 2E24, FGN-TUG S01, FRG 10D1, CTC 1A, 1B, 1C, GENA-OT 1, GHGSat C14, C15, GYEONGGISat 1, MAUVE, PHI 1, SpeQtre, Black Kite 1, BRO 17, 20, 6GStarLab, AE5Ra, AE5Rb, AE5Rc, Lilium 2, PW-6U, R5 S7, TRYAD 1, 2, 3UCubed A, Flock-4h 1, ..., 36, Lilium 3, OTTER, PHASMA-LAMARR, PHASMA-DIRAC, SPiN 2, TORO 2, WISDOM A, B, MICE 1, Veery 0G, HUNITY, SARI 1, 2, Accenture 1, ANISC, HCT-Sat 2, IHI-Sat 2, Lemur-2 227, 228, LUNA 1, T.MicroSat 1, (Transporter 15) | |
| HydroGNSS 2 (Earth Scout 2B) | 2025-276DB | 28.11.2025 | Va SLC-4E | Falcon-9 v1.2 (Block 5) | with FORMOSAT 8A, W-Series 4, IRIDE-MS1-EAGLET2 1, ..., 8, Nahla, YAM 9, Azalea Cluster 1 RF-1, 2, 3, Pelican 5, 6, ICEYE X58, ..., X62, PIAST M, S1, S2, ŅuSat 47, 51, 52, Umbra-SAR 11, Mercury 1, HydroGNSS 1, 2, ION-SCV 021, 022, LacunaSat 4C, ..., 4F Lemur-2 233, 334, 235, Foresail 1p, LEO Express 3, FossaSat 2E22, 2E23, 2E24, FGN-TUG S01, FRG 10D1, CTC 1A, 1B, 1C, GENA-OT 1, GHGSat C14, C15, GYEONGGISat 1, MAUVE, PHI 1, SpeQtre, Black Kite 1, BRO 17, 20, 6GStarLab, AE5Ra, AE5Rb, AE5Rc, Lilium 2, PW-6U, R5 S7, TRYAD 1, 2, 3UCubed A, Flock-4h 1, ..., 36, Lilium 3, OTTER, PHASMA-LAMARR, PHASMA-DIRAC, SPiN 2, TORO 2, WISDOM A, B, MICE 1, Veery 0G, HUNITY, SARI 1, 2, Accenture 1, ANISC, HCT-Sat 2, IHI-Sat 2, Lemur-2 227, 228, LUNA 1, T.MicroSat 1, (Transporter 15) |
Launch Sites:
- Va = Vandenberg Space Force Base, California, USA
References:
- ESA: Second Scout gets the go-ahead, 30 March 2021
