Skip to Content
News

Entries with tag sentinel-1 .

Landslide Monitoring with Geohazards TEP

Geohazards Exploitation Platform has been used to produce a velocity map of the unstable area around the Aletsch Glacier, the largest in the Alps, which is experiencing an average retreat of about 50 m a year. The adjacent rocks that were previously constrained by the ice mass are progressively being released, generating slope instabilities. For this reason, the Aletsch region is a unique place where scientists can investigate how changes in glaciers affect the long- and short-term evolution of rock slope stability. Read the full story here

http://www.esa.int/Our_Activities/Observing_the_Earth/Satellites_monitor_landslide_in_the_Alps

Accessing Sentinel-1 Orbit files on Geohazards TEP

Several ESA Geohazards Exploitation Platform (GEP) early adopters applying for the scenario 2 ‘New EO Service Development’ are currently supported for the integration of their data processing chain on the GEP Cloud environment. 

The resulting processor integration is then made available from the GEP Portal to users (upon sign-in credentials for https://geohazards-tep.eo.esa.int/). On the Portal, authenticated users can select data over an area of interest, set processing parameters, run a processing job and share their results on the platform.

To support these processor integration activities, we have defined an application template, dedicated to the access and the processing of Sentinel-1 data from the Platform. The template, together with the installation procedure, is available on GitHub

Based on this application template, under src/main/app-resources/myapp/run, developers of new Processing applications can now retrieve from the Platform’s catalogue the Sentinel-1 products together with the Precise Orbit Ephemerides data (or POD).

From a running workflow, a function is typically getting the start/end time of the current Sentinel-1 product to be processed, and an OpenSearch query is then performing the retrieval (using the “enclosure” parameter, that provides with the file download location) of the corresponding PODs. A last step is downloading the orbital data from the enclosure reference, and storing it on the proper file system location, in order to be ingested by the SAR processing code embedded in the new application.

In average, ESA releases the Sentinel-1 POD Precise Orbit Ephemerides 20 days after the related acquisition. If you want to process Sentinel-1 products acquired in near-real time, you can also use the orbital data enclosed within the Sentinel-1 product.

To learn more about Sentinel-1 mission and products

READ MORE >

2D displacements over Nepal

2D displacements over Nepal using Sentinel-1 pixel correlation

The Remote Sensing Technology Institute of DLR has published measurements derived from pixel correlation providing 2D displacements following the 25 April 2015 earthquake.

Sentinel-1 data allowed to measure a negative range shift of about 0.8 meters, corresponding to a possible uplift of about 1 meter and an azimuth shift on the order of 1.8 meters.

This is an absolute measurement derived from Sentinel-1 orbital geometry without any reference point on ground.

— 10 Items per Page
Showing 3 results.
VIDEO
Forestry TEP aims to be a one-stop shop for forestry remote sensing services for the academic and commercial sectors.