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Instrument image

Radar Altimeter 2 (RA-2) is an instrument for determining the two-way delay of the radar echo from the Earth's surface to a very high precision: less than a nanosecond. It also measures the power and the shape of the reflected radar pulses.

It is a nadir-looking pulse-limited radar altimeter based on the heritage of ERS-1 RA functioning at the main nominal frequency of 13.575 GHz (Ku Band), which has been selected as a good compromise between the affordable antenna dimension that provides the necessary gain and the relatively low attenuation which experience the signals propagating through the troposphere.

Status
Not Operational
Type
Radar altimeter
Technical Characteristics
Accuracy:
Better than 4.5cm, Wave height: better than 5% or 0.25m
Spatial Resolution:
20km IFOV Altitude: 800km
Swath Width:
Scanning technique: Nadir-only viewing, continuous sampling along track
Waveband:
13.575Ghz (Ku-Band) & 3.2GHz (S-Band)
Earth Topics
Land ( Topography/Mapping ), Snow and Ice ( Sea Ice ), Ocean and Coast ( Ocean Waves , Ocean Currents and Topography ), Atmosphere ( Winds )
Related Instruments
Available Resources Type Access
RA 2 Product Handbook Technical Document download
RA2 Products Specifications Technical Document download
Further information related to RA2 Products and Quality General Reference link
Minimize Latest Mission Operations News

OTF planned maintenance – 19 July 2018

18 July 2018

Due to a scheduled maintenance, access to the On-The-Fly (OTF) Online Dissemination System (OADS) for the ERS and Envisat (A)SAR data will be unavailable during the following time frame:

  • Thursday 19 July 2018 from 09:00 to 16:00 CEST.