THEMATIC AREA
INSTRUMENT

Data

Discover and download the Earth observation data you need from the broad catalogue of missions the European Space Agency operate and support.

data description

Spire live and historical data

The data collected by Spire has a diverse range of applications, from analysis of global trade patterns and commodity flows to aircraft routing ...

other

Data registration and proposals profile

Access your profile to see your requested data products or registrations and proposals you have submitted. An active EO-SSO account is required.

data download

ERS PRARE FTP

Download ERS PRARE orbit products through the ESA Online Dissemination System. The data is freely available to registered users.

other

EO-SSO registration

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

News

Discover the latest news on the European Space Agency's Earth Observation activities. Learn all about new data availability and how ESA's missions are performing.

announcement of opportunity

Announcement of Opportunity for G-POD

ESA is offering all scientists the possibility to perform bulk processing and/or validation of their own algorithms exploiting the large ESA Earth-observation archive.

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general news

New Earth Online Newsletter

Stay up to date with the latest news in our newsletter.

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general news

Mission continuity

Long-term availability of Earth observation data from a given instrument is crucial to many data users and their research—but just how does it work?

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operational news

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.

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operational news

ERS-1 Scatterometer L2 dataset processed with ASPS v10.04 is available online

The reprocessed dataset together with corresponding ERS-2 data is now available.

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operational news

Envisat-ERS (A)SAR - Enhanced Dissemination Service

ESA is pleased to announce the release of several new features as part of the ESA On-The-Fly data processing and dissemination service.

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Missions

Explore the European Space Agency's Earth Observation satellite missions. Learn all about ESA's dedicated Earth Explorers or collaborations with other agencies through the Third Party Missions programme.

ERS
heritage missions

ERS

The ERS programme was composed of two missions, ERS-1 and ERS-2, which together observed the Earth for 20 years, from 1991 to 2011.

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Spire
third party missions

Spire

Spire Global's constellation of Lemur nanosatellites is designed, built, and operated by the company.

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Events

Learn about upcoming Earth observation conferences, workshops and training courses that the European Space Agency organise or support. Discover the results of past events, which may provide useful reference or material for your work.

EVENT - conference

IGARSS 2019

World-class scientists, engineers and educators in geoscience and remote sensing gathered in Yokohama, Japan, for the 39th annual IGARSS symposium.

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EVENT - conference

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.

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TOOLS & TOOLBOXES

Find the tools you need to visualise, analyse and process the European Space Agency's Earth observation data.

TOOLS - analysis

SNAP

SNAP is a common architecture for all Sentinel Toolboxes. Read more

ACTIVITIES

Find the activities you need.

ACTIVITY - cal/val activities

UV nadir viewing galleries

Atmospheric chemistry nadir observation from space now spans nearly forty years. The early UVN (UV nadir missions) mainly focused on measuring ozone. Read more

INSTRUMENTS

Explore the many instruments the European Space Agency use to observe the Earth. ESA offer data from a wide range of optical, radar, atmospheric, altimetric and gravimetric instrumentation.

a-positioning-navigation

PRARE (ERS-2)

Precise Range And Range-Rate Equipment (PRARE) was a microwave tracking system for the measurement of satellite to ground range and range rate.

a-positioning-navigation

LRR (ERS-2)

An optical device for accurate satellite tracking from the ground to support instrument data evaluation

a-spectrometers-radiometers

GOME

GOME is a nadir-scanning ultraviolet & visible spectrometer for global monitoring of atmospheric Ozone

a-spectrometers-radiometers

ATSR-2

Used for measuring sea-surface temperatures, cloud-top temperatures and vegetation monitoring.

OTHER RESOURCES

Browse through mission documentation and reports, and learn more about European Space Agency Earth Observation projects and opportunities.

DOCUMENT - Technical Note

1 Mar 2019

GOME Level 0 to 1 Algorithms Description

After 11 years of GOME measurements, with the instrument still in good shape, ESA has decided on the first complete Level 0-to-1 processing of the entire GOME data set. The main driver for this reprocessing has been the gaps in GDP solar calibration spectra over long time periods, caused by pointing issues on the ERS-2 platform. The new GDP contains improved limit checking on solar spectra, improved line selection for better spectral calibration stability, and algorithmic changes described in this document. The precision error on the solar spectrum has been reformulated, and severaloptions have been updated in the GDP extraction software, following the CHEOPS-GOME study. This comprises improved Peltier crosstalk correction in Band 1a, seasonal correction on BSDF, improvement in Polarisation Correction, and a new degradation correction of Earthshine Reflectivity. As for the Fifth Issue, we maintained the older algorithm descriptions and added the new ones to the end of each chapter. Download