BackForwardInstrument:  Poseidon-4 

Instrument details
Acronym Poseidon-4
Full name Poseidon-4
Purpose Ocean and ice topography, significant wave height, wind speed on sea surface
Short description
  • Dual-frequency (5.4 and 13.58 GHz); SAR capability along-track for high spatial resolution
  • Monitoring and calibration information here
Background

Follow-on of the instrument flown on Sentinel-3

Scanning Technique

No scanning. SAR mode possible to be activated, depending on the target area

Resolution 20 km IFOV. When used in SAR mode, the along-track resolution is 300 m
Coverage / Cycle Global coverage in 1 month for 30 km average spacing, or in 10 days for 100 km average spacing
Mass 60 kg Power 90 W Data Rate 100 kbps, 12 Mbps (SAR)

 

Providing Agency ESA
Instrument Maturity Flown on operational programme
Utilization Period: 2021 to 2036
Last update: 2024-09-23
Detailed characteristics
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Earth observation instrument
  • Active and radio-occultation sensor
  • Radar altimeter
WIGOS Subcomponents
  • Subcomponent 1
  • Wide-swath radar altimeters, and high altitude, inclined, high-precision orbit altimeters
  • High-altitude, inclined, high-precision orbit altimeters
  • Conventional radar altimeter
  • Subcomponent 2
  • Magnetospheric energetic particles and magnetometers
  • Ionospheric total electron content sensor [at LEO and cross magnetosphere]
Mission objectives
Primary mission objectives
  • Geoid
  • Ocean dynamic topography
  • Significant wave height
Evaluation of Measurements