THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - ALT -
Full Name Radar Altimeter Status Operational
Instrument Agencies NSOAS, CAST Maturity
Instrument Type Radar altimeters Geometry Nadir-viewing
Instrument Technology Radar altimeter Sampling Other
Data Access Data Format
Measurements and Applications Global ocean topography, sea level and gravity field measurements.
Resolution Summary 16 km
Swath Summary 16 km
Accuracy Summary < 4 cm
Waveband Summary 13.58 GHz and 5.25 GHz
MW (~1.0 cm - ~100 cm)
Instrument Measurements
CategoryParameterAccuracy
Ocean topography/currentsSea level 
Ocean dynamic topography 
Ocean wave height and spectrumSignificant wave height 
Instrument Missions
HY-2A - Ocean dynamics satellite A (2011 - 2016)
HY-2B - Ocean dynamics satellite B (2017 - 2020)
HY-2C - Ocean dynamics satellite C (2018 - 2021)
HY-2D - Ocean dynamics satellite D (2019 - 2022)
HY-2F - Ocean dynamics satellite F (2020 - 2023)
HY-2E - Ocean dynamics satellite E (2021 - 2024)
HY-2G - Ocean dynamics satellite G (2022 - 2025)
HY-2H - Ocean dynamics satellite H (2024 - 2027)
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