Search items

  • Data - Other

    Data - Other

    EO Sign In registration

    Learn how to register an EO Sign In account, which is required to access some data and submit proposals for data.

  • News - Operational News

    News - Operational News

    Envisat Altimetry Full Mission Reprocessing V3.0

    The ESA Envisat Altimetry Full Mission Reprocessing has been completed with the generation of the V3.0 mission data set.

  • Instrument - Altimeters

    Instrument - Altimeters

    RA (ERS)

    The Radar Altimeter (RA) was a Ku-band (13.8 GHz) nadir-pointing active microwave sensor, on board ERS-1 and ERS-2 missions, designed to measure echoes from ocean and ice surfaces.

  • Document - Technical Note

    Document - Technical Note

    Envisat RA-2 Range Instrumental correction - USO clock periodvariations and associated auxiliary file

    Envisat RA-2 range instrumental correction: USO clock period variations and associated auxiliary file

  • Document - Product Cal/Val Plan/Report

    Document - Product Cal/Val Plan/Report

    ECMWF Report on ERS-2 - May 2002

    ECMWF Report on ERS-2 RA for May 2002

  • Document - Technical Note

    Document - Technical Note

    AOCS Mono-gyro attitude software qualification period

    AOCS Mono-gyro attitude software qualification period

  • Document - Product Handbook

    Document - Product Handbook


    REAPER Product Handbook for ERS Altimetry Reprocessed Products

  • Tools - Analysis, Processing

    Tools - Analysis, Processing


    SNAP is a common architecture for all Sentinel Toolboxes.

  • Document - Product Document

    Document - Product Document


    ERS-1 and -2 orbit validation results

  • News - Scientific Highlights

    News - Scientific Highlights

    Modelling tides in the Arctic Ocean

    A new tidal model produced using ESA satellite data may shed some light on Arctic Ocean tides.

  • Event - Conference, Sessions

    Event - Conference, Sessions

    Living Planet Symposium 2019

    ESA's Living Planet Symposia are amongst the biggest Earth observation conferences in the world. The events see scientists present their latest findings on Earth's environment and climate.

  • News - Scientific Highlights

    News - Scientific Highlights

    ESA's Earth Explorers surpassing expectations

    In this video, learn how each Earth Explorer mission is contributing to Earth science, and changing the way we look at our beloved planet.

  • News - General News

    News - General News

    Satellite Radar Altimetry: past and future

    Satellite radar altimetry measurements yield a wealth of information that can be used for a wide range of applications.

  • News - Scientific Highlights

    News - Scientific Highlights

    Greenland ice loss quickening

    Using a 25-year record of ESA satellite data, recent research shows that the pace at which Greenland is losing ice is getting faster.

  • Instrument - Altimeters

    Instrument - Altimeters


    The RA-2 instrument aboard Envisat acquired radar altimetry data over ocean, land and ice surfaces.

  • Document - User Guide

    Document - User Guide


    This document is a user guide for the Altimeter Waveform Product (ALT.WAP) produced by the United Kingdom Processing and Archiving Facility (UK-PAF). It provides information about the parameters which are contained in the Waveform Product and describes the product format in order to allow users to extract these parameters. This document is intended for use by scientists who are familiar with Altimeter data, though not necessarily with ERS-1/2 Altimeter data.

  • Document - Technical Note

    Document - Technical Note

    UTC-SBT time correlation study

    UTC-SBT time correlation study

  • Document - Technical Note

    Document - Technical Note

    The RA-2 On-Board Tracker and its Autonomous Adaptable Resolution

    This technical note describes the complete functionality of the RA-2 on-board Tracker and how its Resolution Selection Logic (RSL) works. It gives a detailed analysis of the algorithm and its configuration parameters.

  • Document - Technical Note

    Document - Technical Note


    This is an information note to be distributed to the user community regarding the processing upgrades performed on the ESA Altimetry NRT and OFL processing chains, respectively implemented in the RA2/MWR IPF v6.02L04 and CMA v9.3.

  • Document - General Reference

    Document - General Reference


    This report provides a detailed assessment of the dual frequency Radar Altimetry (RA-2) to be implemented on ENVISAT. It addresses the integrated altimeter system including the microwave radiometer and positioning systems, the instrument observation and mission requirements, and the algorithm maturity and geophysical parameter retrieval.