earth online
  • All Categories
  • Data
  • News
  • Missions
  • Events
  • Tools
  • Activities
  • Instruments
  • Campaigns
  • Documents
  • Activity - Projects

    Dragon 3 Cooperation Programme

    The Dragon 3 Programme focussed on the exploitation of ESA, ESA's Third Party Missions and Chinese Earth observation data for geo-science and applications development in land, ocean and atmospheric applications.

  • News - General News

    prompt photo

    Introducing Mirko Albani

    In this short introduction, ESA's Heritage Missions Programme Manager describes what he likes most about ESA's long term archive of satellite mission data and his role in the programme.

  • Activity - Projects

    Dragon 2 Cooperation Programme

    The Dragon 2 Programme focussed on the exploitation of ESA, ESA's Third Party Missions and Chinese Earth observation data for science and applications development in land, ocean and atmospheric applications.

  • Document - General Reference

    prompt photo

    Spacelab-in-context.pdf

    This document provides an overview of Spacelab, a joint ESA-NASA laboratory that was carried aboard space shuttles from 1981 to 2000.

  • Tools - Apps

    prompt photo

    Heritage Missions app for Android

    Download the Heritage Missions application to discover what the missions were about, how it worked and what the elements of the space and ground segment that make these missions unique.

  • Document - General Reference

    prompt photo

    In-action-around-the-world-the-International-Charter-Space-and-Major-Disasters.pdf

    This is an article extracted from the ESA Bulletin Nr.143.

  • Document - General Reference

    prompt photo

    ARTEMIS-Paving-the-way-for-Europes-future-data-relay-land-mobile-and-Navigation-Services.pdf

    This brochure provides an overview of Artemis, ESAs telecommunications satellite.

  • Document - General Reference

    prompt photo

    Understanding climate change from space

    This document describes ESA's Climate Change Initiative, and how it is intended to contribute towards monitoring and understanding the Earth's climate.

  • Document - Proceedings

    prompt photo

    2nd-Conference-on-Academic-and-Industrial-Cooperation-in-Space-Research.pdf

    This document describes the proceedings of the second conference on academic and industrial cooperation in space research, held in Graz, Austria, 15-17 November 2000.

  • Instrument - Positioning/Navigation

    prompt photo

    PRARE

    The Precise Range And Range-Rate Equipment (PRARE) was a microwave tracking system on board the ERS-1 and ERS-2 missions.

  • Data - Data Description

    prompt photo

    ERS PRARE Precise Orbit Product (ERS.ORB.POD/ERS.ORB/PRC)

    The precise orbit results from a data reduction process in which all available tracking data (Single-Lens Reflex, radar altimeter crossovers, PRARE range and Doppler data) and most accurate correction, transformation and dynamical models are taken into account and in which high level numerical procedures are applied. These orbits are "optimal" achievable representations of the real orbital motion under the circumstances of tracking situation and the "state of the art" model situation. The precise orbit product for the ERS satellites are the satellite ephemeris (position and velocity vector) including time tag, given in a well-defined reference frame, together with the nominal satellite attitude information and a radial orbit correction. Several orbit solutions are currently distributed: A new set of ORB POD (Precise Orbit Determination - REAPER v2) computed with the most updated model standards for the complete ERS-1 and ERS-2 mission. A previous set of ORB POD (REAPER v1) data already available on the ESA dissemination site since 2014, covering the ERS-1 full mission and the ERS-2 mission up to July 2003. ORB PRC which is the original Precise Orbit dataset computed during the ERS mission operations for ERS-1 and ERS-2. In the new POD dataset (REAPER v2) for the ERS-1 and ERS-2 missions, two different orbit solutions are provided together with the combined solution to be used for processing of the radar altimeter measurements and the determination of geodetic/geophysical products: those computed by DEOS (Delft Institute of Earth Observation and Space Systems), and those generated by ESOC (European Space Operations Centre) using different software (GEODYN and NAPEOS respectively). Careful evaluation of the various solutions of REAPER v2 has shown that the DEOS solution for both ERS-1 and ERS-2 has the best performance and is recommended to be used as reference. See the ERS Orbit Validation Report. For the previous version of the POD data set (REAPER v1), with ERS-2 mission data only up to 2003, three different orbit solutions together with the combined solution are available. These precise orbits for ERS-1 and ERS-2 have been computed at DEOS, ESOC, and GFZ (Deutschen GeoForschungsZentrums) using different software and different altimeter databases. Combined solutions have been created using three individual solutions for each satellite. All orbits were derived using consistent models in the same LPOD2005 terrestrial reference frame. These new orbit solutions show notable improvement with respect to DGME04 orbits (Scharroo and Visser, 1998). Thus, RMS crossover differences of new orbits improved by 4-9 mm. Careful evaluation of the various solutions has shown that the combined solution for both ERS-1 and ERS-2 has the best performance. All POD orbit files (REAPER v1/v2) are available in SP3c format.

  • Tools - Analysis

    prompt photo

    SNAP

    SNAP is a common architecture for all Sentinel Toolboxes. It is ideal for Earth observation processing and analysis.

  • News - Data Release news

    prompt photo

    Updated Precise Orbit data (POD) for the full ERS-1 and ERS-2 mission available

    The Precise Orbit files (ERS.ORB.POD) for the entire ERS-1 and ERS-2 mission periods have been reprocessed with up-to-date standards.

  • Document - Proceedings

    prompt photo

    ERS-Envisat-symposium-proceedings.pdf

    This document contains the proceedings of the ERS-Envisat Symposium, which took place in 2000.

  • Document - General Reference

    prompt photo

    Sentinel-1-The-Radar-Mission-for-GMES-Land-and-Sea-Services.pdf

    This article is extracted from ESA Bulletin Nr. 131.

  • Document - General Reference

    prompt photo

    Medspiration-A-Precursor-to-the-GMES-Marine-Core-Service-Sea-Surface-Thematic.pdf

    This is an article extracted from the ESA Bulletin Nr. 132.

  • Document - General Reference

    prompt photo

    Meteosat-Second-Generation-The-Satellite-Development.pdf

    This publication provides a comprehensive overview of the history of the MSG programme, the mission objectives, the design and development of the MSG spacecraft.

  • Document - General Reference

    prompt photo

    Meteosat-Second-Generation.pdf

    This flyer summarises in short the aims, applications and technology of the MSG mission.

  • Document - General Reference

    prompt photo

    The four Candidate Earth Explorer Core Missions - Land-Surface Processes and Interactions Mission

    This report describes the Land-Surface Processes and Interactions Mission, one of the four Candidate Earth Explorers in 1999.

  • Document - General Reference

    prompt photo

    Global-Monitoring-for-Environment-and-Security-(GMES)-Industry-gathers-for-ESA-EC-global.pdf

    This article was published in the Earth Observation Quarterly Nr. 71 and describes how GMES will support European Union policies in areas such as sustainable development, global climate changes and access to information on the environment and security at the global, regional and local levels.

Cookies & Privacy

We use cookies which are essential for you to access our website and to provide you with our services and allow us to measure and improve the performance of our website. Please consult our Cookie Notice for further information or to change your preferences.