Measurements and Applications
Nadir viewing sounding radar for provision of real-time high-precision sea surface topography, ocean circulation and wave height data.
Full Name
Poseidon-4 SAR Radar Altimeter
Status
Operational
Instrument Agencies
Maturity
Instrument Type
Radar altimeters 
Geometry
Nadir-viewing
Instrument Technology
Radar altimeter
Sampling
Sounding
Data Access
Open Access
Data Format
NetCDF-4
Swath
On baseline TOPEX/POSEIDON orbit (10 day cycle): 300 km between tracks at equator.
[Max Swath: 300 km]
Accuracy
Sea level: 3.2 cm, Significant wave height: 0.15 m, Horizontal sea surface wind speed: 1.5 m/s
Waveband
Microwave: Ku-band (13.575 GHz), C-band (5.3 GHz)
| Ku-Band (12.5 to 18 GHz) |
| C-Band (8 - 4 GHz) |
Sentinel-6 A Michael Freilich - Sentinel-6 Michael Freilich (2020 - 2027) |
Sentinel-6 B - Sentinel-6 B (2025 - 2032) |
| Sentinel-6 C - Sentinel-6 C (2040 - 2046) |