News - Thematic area articles

Cloud-free collections key for land monitoring

Satellite imagery is a crucially important tool for monitoring the land, but cloud cover can often block parts of Earth’s surface from view, limiting subsequent analyses.

News - Infographics

Key facts about Canada's ozone-studying SCISAT mission

Learn about the SCISAT mission in our new infographic.

Tools - Catalogues

FedEO

FedEO is a data catalogue that provides a unique entry point to a number of scientific catalogues and services for, but not limited to, European and Canadian missions.

Tools - Catalogues

ESA PDGS DataCube

ESA's DataCube is a data catalogue that enables multi-temporal and pixel-based access to a subset of data available from ESA

Tools - Catalogues

EO CAT

EO CAT is a data catalogue, offering a Next Generation Earth Observation system designed to manage end-user Earth Observation services.

Event - Conference

Atmospheric Science Conference 2006

The 2006 conference was dedicated the theme atmosphere to provide scientists and data users with the opportunity to present first-hand and up-to-date results from their ongoing research activities ESA Mission instruments.

Document - Publication - Paper

Atmospheric-Chemistry-Experiment-ACE-Mission-Overview.pdf

This paper was published in the GEOPHYSICAL RESEARCH LETTERS, Vol.32 (L15S01, doi:10.1029/2005GL022386, 2005) and presents an overview of the Canadian mission SCISAT-1 (also known as the Atmospheric Chemistry Experiment ACE) and some of its first scientific results.

News - Data Release news

SPOT 4-5 Take 5 ESA archive online dataset

ESA is pleased to announce the availability of SPOT 4-5 Take 5 products to the scientific community.

Data - EO Sign In Authentication (Open)

SPOT 4-5 Take5 ESA archive

At the end of SPOT-4 mission, the Take5 experiment was launched and the satellite was moved to a lower orbit to obtain a 5 day repeat cycle, same repetition of Sentinel-2. Thanks to this orbit, from 1 February to 19 June 2013 a time series of images acquired every 5 days with constant angle and over 45 different sites were observed. In analogy to the previous SPOT-4 Take-5 experiment, also SPOT-5 was placed in a 5 days cycle orbit and 145 selected sites were acquired every 5 days under constant angles from 8 April to 31 August 2015. With a resolution of 10 m, the following processing levels are available: Level 1A: reflectance at the top of atmosphere (TOA), not orthorectified products Level 1C: data orthorectified reflectance at the top of atmosphere (TOA) Level 2A: data orthorectified surface reflectance after atmospheric correction (BOA), along with clouds mask and their shadow, and mask of water and snow. Spatial coverage: Check the spatial coverage of the collection on a map available on the Third Party Missions Dissemination Service.

Data - Fast Registration with approval (Restrained)

SPOT 1-5 ESA archive

The ESA SPOT 1-5 collection is a dataset of SPOT 1 to 5 Panchromatic and Multispectral products that ESA collected over the years. The HRV(IR) sensor onboard SPOT 1-4 provides data at 10 m spatial resolution Panchromatic mode (-1 band) and 20 m (Multispectral mode -3 or 4 bands). The HRG sensor on board of SPOT-5 provides spatial resolution of the imagery to < 3 m in the panchromatic band and to 10 m in the multispectral mode (3 bands). The SWIR band imagery remains at 20 m. The dataset mainly focuses on European and African sites but some American, Asian and Greenland areas are also covered. Spatial coverage: Check the spatial coverage of the collection on a map available on the Third Party Missions Dissemination Service. The SPOT Collection

Data - External Data (Restrained)

SciSat-1: ACE-FTS and MAESTRO

SCISAT-1 data aim at monitoring and analysing the chemical processes that control the distribution of ozone in the upper troposphere and stratosphere. It provides acquisitions from the two instruments MAESTRO and ACE-FTS. MAESTRO: Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation. Dual-channel optical spectrometer in the spectral region of 285-1030 nm. The objective is to measure ozone, nitrogen dioxide and aerosol/cloud extinction (solar occultation measurements of atmospheric attenuation during satellite sunrise and sunset with the primary objective of assessing the stratospheric ozone budget). Solar occultation spectra are being used for retrieving vertical profiles of temperature and pressure, aerosols, and trace gases (O3, NO2, H2O, OClO, and BrO) involved in middle atmosphere ozone distribution. The use of two overlapping spectrometers (280 - 550 nm, 500 - 1030 nm) improves the stray-light performance. The spectral resolution is about 1-2 nm. ACE-FTS: Fourier Transform Spectrometer. The objective is to measure the vertical distribution of atmospheric trace gases, in particular of the regional polar O3 budget, as well as pressure and temperature (derived from CO2 lines). The instrument is an adapted version of the classical sweeping Michelson interferometer, using an optimised optical layout. The ACE-FTS measurements are recorded every 2 s. This corresponds to a measurement spacing of 2-6 km which decreases at lower altitudes due to refraction. The typical altitude spacing changes with the orbital beta angle. For historical reasons, the retrieved results are interpolated onto a 1 km "grid" using a piecewise quadratic method. For ACE-FTS version 1.0, the results were reported only on the interpolated grid (every 1 km from 0.5 to 149.5 km). For versions 2.2, both the "retrieval" grid and the "1 km" grid profiles are available. SCISAT-1 collection provides ACE-FTS and MAESTRO Level 2 Data. As of today, ACE-FTS products are available in version 4.1, while MAESTRO products are available in version 3.13.

Data - Fast Registration with approval (Restrained)

Image 2006 European coverage

The Image 2006 collection is a SPOT-4, SPOT-5 and ResourceSat-1 (also known as IRS-P6) cloud free coverage over 38 European countries in 2006 (from February 2005 to November 2007). The Level 1 data provided in this collection originate from the SPOT-4 HRVIR instrument (with 20 m spatial resolution), from SPOT-5 HRG (with 10 m spatial resolution resampled to 20 m) and IRS-P6 LISS III (with 23 m spatial resolution), each with four spectral bands. The swath is of about 60 km for the SPOT satellites and 140 km for the IRS-P6 satellite. In addition to the Level 1, the collection provides the same data geometrically corrected towards a European Map Projection with 25 m resolution. Spatial coverage: Check the spatial coverage of the collection on a map available on the Third Party Missions Dissemination Service.

Mission - Heritage Missions

SPOT

The SPOT (from French "Satellite pour l'Observation de la Terre") series of missions has been supplying high-resolution, wide-area optical imagery since 1986.

Document - General Reference

SPOT satellite technical data - High Resolution Instruments, Vegetation Instrument, Stereoscopic Instruments

SPOT satellite technical data - High Resolution Instruments, Vegetation Instrument, Stereoscopic Instruments

Document - Technical Note

Resolutions and spectral modes - generating four levels of resolution, black and white and colour-

Resolutions and spectral modes - generating four levels of resolution, black and white and colour.

Document - Technical Note

Processing levels and location accuracy of Spot Image's processing levels

Processing levels and location accuracy of Spot Image's processing levels

Document - Technical Note

IMAGE2006 European Coverage - Methodology and Results

Document - Technical Note

DIMAP (Digital Image Map)

Document - Product Specifications

ACE-FTS Atmospheric Chemistry Experiment - File format description for ACE-Imager level 2 data ---

Mission - Heritage Missions

SPOT 4

SPOT 4, like all the SPOT missions, was aimed at supplying high-resolution, wide-area optical imagery.