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How to find data collection in EO CAT?
A short guide to EO-CAT Earth Observation Catalogue application with examples.
New stories on change detection and ERS-2 re-entry in HEDAVI
Two new stories are now available in ESA’s HEDAVI (HEritage DAta VIsualisation) tool. HEDAVI visualises Earth observation data from satellites in ESA’s Heritage and Third Party Missions programme, and includes some data from the Copernicus Sentinel satellites.
Eruption of Mount Merapi Volcano (Indonesia), May-June 2006
See Mount Merapi's 2006 activity through Envisat satellite imagery, capturing the volcano's response to seismic events.
Etna and Surroundings (Italy), 2004
Explore the satellite view of Mount Etna and its topographical features captured by Envisat in March 2004.
Earthquake in Bam (Iran), December 2003
View satellite images depicting damage in Bam (Iran), from the powerful 2003 earthquake.
Earthquake/Tsunami in Japan, March 2011
Explore satellite images documenting the transformation of northern Japan before and after the 2011 earthquake and tsunami.
Eruption of Merapi Volcano (Indonesia), October 2010
See Mount Merapi in Indonesia through the Envisat satellite image captured in November 2010.
Athabasca Oil Sands (Canada): A Satellite Perspective from 1992 to 2011
Explore the Athabasca Oil Sands in Alberta, through satellite imagery.
Grímsvötn Volcano eruption (Iceland), November 2004
View satellite image capturing the aftermath of the 2004 eruption of Grímsvötn Volcano in Iceland.
Envisat data show how volcanoes communicate with each other
Using radar data from ESA’s Envisat mission, scientists have recently proven the elastic interaction between two Hawaiian volcanoes.
Meet a young researcher who studies the behaviour of volcanoes worldwide
Researcher Camila Novoa Lizama, of the University of Leeds, recently analysed how the use of Synthetic Aperture Radar (SAR) imagery over the Puyehue Cordón-Caulle Volcanic Complex, in Chile, acquired by ALOS-1, Envisat and the Copernicus Sentinel-1 satellites, helped her team to better comprehend the temporal and spatial behaviour of ground displacements before, during and after the volcano’s last eruption.
Data preservation takes centre stage at Living Planet Symposium
Against the backdrop of the famed Rhine River, world-class scientists and Earth observation data-users are gathered this week in the historical city of Bonn, at the Living Planet Symposium (LPS).
How ESA uses space data to explore deep Earth
As anthropogenic activities continue to unbalance our environment, scientists strive to fully understand the intricate interactions within Earth’s system.
How Envisat helped to shape global understanding of Earth’s systems
Twenty years have passed since a ground-breaking European spacecraft designed to deliver unprecedented insight into the planet’s changing environment was lofted into orbit.
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.
Envisat ASAR Daily Report 04 Jan 2005
Envisat ASAR Daily Report
Envisat ASAR Daily Report 03 Jan 2005
Envisat ASAR Daily Report
Envisat ASAR Daily Report 05 Jan 2005
Envisat ASAR Daily Report
Envisat ASAR Daily Report 02 Jan 2005
Envisat ASAR Daily Report
Envisat ASAR Daily Report 01 Jan 2005
Envisat ASAR Daily Report