Who are we?

Project Details

  • Name: Sentinel-1 INSAR Performance Study with TOPS Data
  • Acronym: InSARap
  • Kick-Off: March 2014
  • Project extension: April 2016
  • Project duration: 18 months + 18 months
  • Project related web-sites:

Project Consortium

The objective of the ESA’s SEOM Programme InSARap project is the scientific exploitation and validation of the interferometric TOPS mode implemented on the Sentinel-1 mission. The extremely interesting and challenging questions were a perfect match for the partners involved in this consortium, both on short and long term. And based on this interest, a consortium was formed and bid for this tender. Specifically, the consortium includes the following partners:

Anticipated results:

  • Confirm and document Sentinel-1 interferometric performance.
  • Assess the synergy between Sentinel-1 and previous C-band SAR missions.
  • Adapt already successful DINSAR and PSI techniques to TOPS SAR data.
  • Provide the scientific community with the first DINSAR and PSI results over selected pilot sites.

Some of Our Recent...

Results & Updates

Interferometry results derived from processing standard products generated from the data acquisitions of the Sentinel-1 mission from the European Union Copernicus programme.

Kumamoto Earthquake: Sentinel-1 InSAR results

April 2016

Results Description

The 2016 Kumamoto earthquakes are a series of earthquakes beneath Kumamoto City, Japan. The mainshock at magnitude 7.0 occurred on April 16, 2016, depth about 10 kilometres, and a foreshock earthquake which preceded it with a magnitude 6.2 on April 14, 2016, depth about 11 kilometres.

We computed a set of coseismic Sentinel-1A interferograms, over the affected area.

  • Ascending track 156: 2016-04-08 / 2016-04-20, Perp. baseline -67.3m
  • Descending track 163: 2016-03-27 / 2016-04-20, Perp. baseline -0.1m

Download section

Ascending Interferogram, Track 156:
Descending Interferogram, Track 163:
Additional Information

KMZ and GeoTiff files that are available for download, are generated for high-resolution investigations in GoogleEarth and post-processing & interpretation. They are not prepared for overviews, and thus are not heavily smoothed nor filtered.

Data & Results Terms and Conditions

All Sentinel-1 results that are available for download are Derived Works of Copernicus data (2016), subject to the following use conditions: "TERMS AND CONDITIONS FOR THE USE AND DISTRIBUTION OF SENTINEL DATA AND SERVICE INFORMATION".

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    Kumamoto Quakes captured by S-1

    Japan, Asia

  • Chile Earthquake: Sentinel-1 InSAR analysis

    September 2015

    Results Description

    On September 16, 2015, an earthquake of magnitude 8.3 occurred in Chile and lasting three minutes. The earthquake occurred on thrust faults along the boundary of the Nazca and South African plates.

    We computed a coseismic descending (24.08 - 17.09.2015) and ascending (26.08 - 19.09.2015) Sentinel-1 interferograms, over the affected area. The perpendicular baseline of the descending pair is 123 m and of ascending one 80 m.

    Initial Interpretation

    Our initial interpretation by a manual by-eye fringe count of the descending interferogram indicated about 140 cm Line-of-Sight displacement. While study of the phase difference in the burst overlaps of the same interferogram indicated approximately 50 cm of horizontal (alongtrack) motion. At later stage we also performed comparison of descending and ascending interferograms. The burst overlap phase has equal magnitudes and signs in both tracks and the standard Line-of-Sight phase has almost equal magnitudes and opposite signs. This, suggests a pure westwards horizontal component, and a small vertical component (if any).

    Refined Interpretation

    We also computed a decomposed solution that is also available for download. We performed a decomposition in the East-West/vertical plane assuming no North-South component, as indicated by the burst overlap signs and magnitudes. The East-West component, scales from [-210,210] cm, positive red towards west, see relevant KMZ file in the download section. The Vertical component, in order to avoid enhancing the atmospheric residues, is scaled to [-30,30] cm. The positive (red) downwards. Extreme values, see relevant KMZ file, are about -15 cm (blue), and 18 cm (red), respectively. Note that atmosphere and a few unwrapping errors show clearly through this result due to the reduced dynamic range (atmospheric noise level is a couple of fringes at least).

    Download section

    Descending 24.08-17.09 2015 Interferogram:
    Ascending 26.08-19.09 2015 Interferogram:
    Decomposed solution:
    Additional Information

    KMZ and GeoTiff files that are available for download, are generated for high-resolution investigations in GoogleEarth and post-processing & interpretation. They are not prepared for overviews, and thus are not heavily smoothed nor filtered.

    Data & Results Terms and Conditions

    All Sentinel-1 results that are available for download are Derived Works of Copernicus data (2015), subject to the following use conditions: "TERMS AND CONDITIONS FOR THE USE AND DISTRIBUTION OF SENTINEL DATA".

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    Chile Quake captured by S-1

    Chile, South America

  • Nepal Earthquake: Sentinel-1 InSAR analysis

    April 2015

    Results Description

    On the 25th of April 2015, an earthquake of magnitude 7.8 occurred in Nepal as the result of thrust faulting on, or near, the main frontal thrust between the sub-ducting India plate and the overriding Eurasia plate to the north. Please check the USGS web page for the latest official information.

    This section of the insarap.org page is meant to be a collection of Sentinel-1 related interferometric information, results & visualizations for the research community.

    Presently a number of coseismic and preseismic interferogram are available for download. However, as soon as data for more coseismic interferograms is acquired and made available on the Sentinel-1 Scientific Data hub, we will make these coseismic results available for download in KMZ and/or GeoTiff format.

    Coseismic Interferograms

    A number of coseismic interferograms are available for download.

    The interferogram from 02.Apr - 26.Apr (ascending), is in the far northwestern part of the affected area. It is hard to to tell if this interferogram captures the outskirts of the earthquake butterfly, or if it is only atmospheric disturbances affecting the signal. Nevertheless we believe that these are very likely coseismic fringes.

    Download links:
      02.Apr - 26.Apr

    These interferograms are on the edges of the affected area and likely do not contain any significant displacement signal.

    Download links:

    This interferogram is over the main slip, and it clearly visualizes the displacement signal. It is approximately 34 fringes or 1 meter line-of-sight displacement. Also a preliminary version an unwrapped interferogram is available for download. Notice that in the area where the strong motion in the radar azimuth direction is predicted, burst jumps can be observed. This has been confirmed by the study of the burst overlap zones, see the relevant KMZ file. Recently results of offset/speckle tracking in azimuth and range direction are added. Also a file containing Line of Sight and other geometry information, needed for the geophysical modeling, is available for download.

    Download links:

    For this interferograms number of visualization options are available, as well as GeoTiff of wrapped and unwrapped phase (flat binary, containing only phase information):

    This interferogram covers the earthquake area well, but unfortunately it is incoherent in the interesting area. Note that with advanced filtering methods better results might be obtained - link to tweet and results of Pablo J. Gonzales and COMET team..

    Download links:

    In this interferogram the northeastern wing of the butterfly is clearer, but in overall not much coherence. Note that by studying burst overlaps a horizontal motion is observed.

    Download links:

    Preseismic Interferograms

    A number of preseismic interferometric combinations were also processed and made available for download. These when coupled with initial model of GeoGateway or USGS Impact Shakemap, that are based on a USGS modeling mechanisms, give a very good idea of where can we expect coherent input to the geophysical modeling.

    Additional Information

    KMZ and GeoTiff files that are available for download, are generated for the full resolution investigations in GoogleEarth and post-processing & interpretation. They are not prepared for overviews, and thus are not heavily smoothed nor filtered.

    Data & Results Terms and Conditions

    All Sentinel-1 results that are available for download are Derived Works of Copernicus data (2015), subject to the following use conditions: "TERMS AND CONDITIONS FOR THE USE AND DISTRIBUTION OF SENTINEL DATA".

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    Himalayan Earthquake: Coseismic results

    Nepal, Asia

  • Calbuco Volcano Eruption observed by Sentinel-1

    April 2015

    Results Description

    On 22nd April Calbuco volcano, Chile, erupted for the first time in four decades with a very little warning. The eruption lasted 90 minutes and sent a plume of volcanic ash 10 km into the sky. A flow of lava was reported into Chapo Lake on the same day. The eruption caused airline flight cancellations to Chile as well as Argentina and Uruguay. Authorities evacuated 4000 people from a zone with a 20 km radius from the volcano. For more information and background refer to WikipediA.

    This interferogram was computed by combining two radar images acquired over the area of Calbuco Volcano, Chile, during the time of a volcanic eruption. Specifically, it was computed by combining images acquired on 14th and 26th of April, both in a ascending Interferometric Wide Swath mode.

    The KZM file of this interferogram is available for download via insarap.org web-page, while for the interpretation and further analysis of the volcano eruption refer to the work of NERC COMET team.

    Download links

    All Sentinel-1 results that are available for download are Derived Works of Copernicus data (2015), subject to the following use conditions: "TERMS AND CONDITIONS FOR THE USE AND DISTRIBUTION OF SENTINEL DATA".

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    Calbuco Volcano monitored by S-1

    Calbuco, Chile

  • Archive of

    Previous Results

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      Sentinel-1 TOPS Interferogram

      August 2014

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      Sentinel-1 DInSAR: Napa Earthquake

      September 2014

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      Fogo Volcano eruption observed by Sentinel-1

      November 2014

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      Sentinel-1 InSAR on a Continental Scale

      Nov/Dec 2014

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      Sentinel-1 InSAR on a Continental Scale

      Feb 2015

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      Project in Media (Page Coming Soon)

      Year 2014 & 2015

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