Document - Publication - Paper

VERIFICATION OF THE RA2-MWR LEVEL 2 GEOPHYSICAL REFERENCE PROCESSORS

Document - Product Cal/Val Plan/Report

Validation Report following the 3rd MERIS data reprocessing

This document prepared by the MERIS Quality Working Group (QWG) corresponds to the Validation Report following the 3rd MERIS data reprocessing. It aims at qualifying and quantifying the accuracy of the MERIS L2 products generated with the version 8.0 of MERIS Ground Segment prototype (MEGS), delivered to the whole community through the ODESA software (http://earth.eo.esa.int/odesa/). It is equivalent to version 6.0 of the Instrument Processing Facilities (IPF) at ESRIN.

News - Thematic area articles

Transforming space data into climate action

ESA’s Earth observation activities are playing a key role in the revitalised global drive to combat climate change.

News - Thematic area articles

Tracking the world’s forests from space

As human activities continue to threaten the planet’s forests, data delivered by satellites are boosting global efforts to conserve these crucial natural resources.

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 - General Reference

The Envisat Radar Altimeter System (RA-2)

This article was published in the ESA Bulletin Nr. 98 and givesdetails on RA-2 and on its role in the ENVISAT mission.

Document - General Reference

Taking-the-Measure-of-Earth-Fifteen-Years-of-Progress-in-Radar-Altimetry.pdf

This article is extracted from ESA Bulletin Nr. 128.

Document - Campaign Report

SPARC-2004-data-acquisition-report.pdf

SPARC-2004 campaign objective was to collect a CHRIS/PROBA reference dataset for SPECTRA-related studies.

Campaign

SPARC

ESA's SPectra bARrax Campaign (SPARC) activity was part of the preparatory study for a proposed ESA Earth Explorer mission called SPECTRA. The objective was to collect a CHRIS/PROBA reference dataset for SPECTRA-related studies.

Data - Campaigns (Open)

SPARC

ESA's SPectra bARrax Campaign (SPARC) activity was part of the preparatory study for a proposed ESA Earth Explorer mission called SPECTRA. The objective was to collect a CHRIS/PROBA reference dataset for SPECTRA-related studies.

News - Thematic area articles

Space data support Earth’s ecosystems

ESA’s Earth observation (EO) missions are making a critical contribution to monitoring transformations in our planet’s ecosystems, helping track changes in the vegetation, soil, and ocean that affect these systems.

Tools - Analysis

SNAP

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

Activity - Quality

SEOM CAWA

The Advanced Clouds, Aerosols and WAter vapour products for Sentinel-3/OLCI project aims to develop and improve the advanced atmospheric retrieval algorithms developed for MERIS and OLCI instruments.

Tools - Analysis

Sentinel-3 Toolbox

The Toolbox consists of a set of visualisation, analysis and processing tools for the exploitation of OLCI and SLSTR data.

Campaign

SEN3EXP

The main objective of Sen3Exp (Sentinel-3 Experimental Campaign) was to provide a comprehensive dataset that covers all Sentinel-3 OLCI and SLSTR bands that is to be used for the algorithm prototype and ground segment processor development.

Data - Campaigns (Open)

SEN3EXP

The main objective of Sen3Exp (Sentinel-3 Experimental Campaign) was to provide a comprehensive dataset that covers all Sentinel-3 OLCI and SLSTR bands that is to be used for the algorithm prototype and ground segment processor development.

Data - EO Sign In Authentication (Open)

Sea Ice Thematic Data Product [ALT_TDP_SI]

This is the Sea Ice Thematic Data Product (TDP) V1 resulting from the ESA FDR4ALT project and containing the sea ice related geophysical parameters, along with associated uncertainties: snow depth, radar and sea-ice freeboard, sea ice thickness and concentration. The collection covers data for the ERS-1, ERS-2 and Envisat missions, and bases on Level 1 data coming from previous reprocessing (ERS REAPER and the Envisat V3.0) but taking into account the improvements made at Level 0/Level 1 in the frame of FDR4ALT (ALT FDR). The Sea Ice TDP provides data from the northern or southern hemisphere in two files corresponding to the Arctic and Antarctic regions respectively for the winter periods only, i.e., October to June for the Arctic, and May to November for the Antarctic. For many aspects, the Sea Ice TDP is very innovative: First time series of sea-ice thickness estimates for ERS Homogeneous calibration, allowing the first Arctic radar freeboard time series from ERS-1 (1991) to CryoSat-2 (2021) Uncertainties estimated along-track with a bottom-up approach based on dominant sources ERS pulse blurring error corrected using literature procedure [Peacock, 2004] The FDR4ALT products are available in NetCDF format. Free standard tools for reading NetCDF data can be used. Information for expert altimetry users is also available in a dedicated NetCDF group within the products. Please consult the FDR4ALT Product User Guide before using the data. The FDR4ALT datasets represent the new reference data for the ERS/Envisat altimetry missions, superseding any previous mission data. Users are strongly encouraged to make use of these datasets for optimal results.

Document - Conference Presentation - Poster

Remaining-East-West-bias-explained.pdf

This presentation shows the results obtained from a scientific assessment on the use of GDR-D improved orbit standard and of the consequent improvement in the Sea Surface Height and Sea Level Anomaly Data of altimeter GDR data (A. Ollivier, OSTST 2011).

News - Data Release news

Release of Envisat MERIS 4th reprocessing data

The data from the 4th MERIS reprocessing has been released to users and is now freely available from the new ESA Online Dissemination Service for MERIS.

Document - Technical Note

Reference Model for MERIS Level 2 Processing

The specifications provided here define the parameters to be used to generate inherent optical properties for the ocean and atmosphere as a function of geophysical properties and wavelengths, which can be the basis upon which to generate test data and auxiliary parameters needed for operation and end-to-end tests of the MERIS ground segment processor (i.e., mostly to generate water-leaving reflectances or total reflectances at the top of the atmosphere level). Parameters have been selected from various measurements and models in water, surface and atmosphere.