ESA SEOM InSARap Project :: Versus Page InSARap Project European Space Agency / SEOM Study InSARap Project Project Details Results & Updates Project Archive Contact 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: Copernicus Programme Sentinel Missions Online European Space Agency ESA SEOM Programme 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: Norut, Norway (Prime Contractor) PPO.labs, The Netherlands University of Leeds, United Kingdom Polish Geological Institute (PGI), Poland NGU (Geological Survey of Norway), Norway 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. Bay Area Mapped by Sentinel-1 November 2016 Background & Scope A team of researchers, within a scope of ESA - SEOM InSARap project performed an interferometric time series analysis of Copernicus Sentinel-1 data which higlighted and confirmed some of the previously reported findings of subsidence in the area. For example widely reported sinking of the Millennium Tower, subsidence due to reclamed land, Hayward Fault to outline the few were sucessfully observed. While the results speak for themselves, we can just once more reiterate on the usefulness of the Copernicus Programme, in this case for deformation monitoring applications. Further Information For more details, background and context, preliminary results interpretation, and high-resolution images, please refer to the ESA WebStory: Satellites Confirm Sinking of San Francisco Tower Results in Media In adition to the ESA WebStory, our results were also prominently featured, and generated lots of interest in the mainstream media, and by public in general. Here were a listing only few reports, that in our opinionon have generated the highest impact: Associated Press - Leaning San Francisco tower seen sinking from space New York Times - San Francisco Tower Can Be Seen Leaning From Space The Register - San Francisco’s sinking luxury Millennium Tower: Tilt spotted FROM SPACE Spiegel - Wolkenkratzer in San Francisco sackt ab Result of Google News query on keywords - "Satellite + Sentinel + San + Francisco" Analysis Summary Data overview: Sentinel-1 A IW mode Observation window February 2015 - September 2016 Data download via Scientific Data Hub Processing overview: Time series analysis perfromed with: Persistent Scatterer InSAR methodology Absence of Warranty The analysis and results of the Bay Area were obtained within a scope of the scientific, and research and development projects, and are provided without any express or implied warranty, including as regards quality and suitability for any purpose. Data & Results Terms and Conditions All Sentinel-1 results that are available for download are Derived Works of Copernicus data (2015-2016), subject to the following use conditions: "TERMS AND CONDITIONS FOR THE USE AND DISTRIBUTION OF SENTINEL DATA AND SERVICE INFORMATION". + > Bay Area mapped by S-1 California, USA Central Italy Earthquakes: Sentinel-1A/B InSAR analysis August/October 2016 Results Description: ’AMATRICE’ Quake A 6.2M earthquake hit Central Italy, the area of city of Amatrice, on 24 August 2016. The quake epicentre was southeast of Norcia, Italy, in an area near the borders of the Umbria, Lazio, Abruzzo and Marche regions. The quake hypocentre was at a depth of approximately 5 km. At least 290 people have been killed, and dozens more are still accounted missing. InSAR We computed a set of coseismic Sentinel-1A/B interferograms, over the affected area. Descending track 95: S1A (2016-08-26) / S1A (2016-08-14) Descending track 22: S1A (2016-08-21) / S1B (2016-08-27) Ascending track 117: S1B (2016-08-21) / S1A (2016-08-27) Earthquake Motion Decomposition We also performed the two-dimensional earthquake motion decomposition. As an input for the decomposition, data of tracks 22 descending and 117 ascending were used, since they provide the full coverage of the earthquake. Download section Descending Interferogram, Track 95: Goldstein filtered wrapped interferometric phase, 16x4 ML (KMZ format) Interferometric coherence (KMZ format) Descending Interferogram, Track 22: Goldstein filtered wrapped interferometric phase, 16x4 ML (KMZ format) Interferometric coherence (KMZ format) Full geo-coded Goldstein filtered wrapped interferogram, 16x4 ML (GeoTiff format, 50Mb zip file) Intereferorgram subset (GeoTiff format, 10Mb zip file) Specifically for subset: 8x2 ML + goldstein + unwrapping + geocoding, incl oversampling to 10 m + smoothing (5x5 pixel boxcar) + subsampling to ~50m + calibrated at the point at used for 2D decomposition Ascending Interferogram, Track 117: Goldstein filtered wrapped interferometric phase, 16x4 ML (KMZ format) Interferometric coherence (KMZ format) Full geo-coded Goldstein filtered wrapped interferogram, 16x4 ML (GeoTiff format, 80Mb zip file) Intereferorgram subset (GeoTiff format, 7Mb zip file) Specifically for subset: 8x2 ML + goldstein + unwrapping + geocoding, incl oversampling to 10 m + smoothing (5x5 pixel boxcar) + subsampling to ~50m + calibrated at the point at used for 2D decomposition Decomposed Solution Vertical Component (KMZ format) East-West Component (KMZ format) Vertical Component (GeoTiff format, 90Mb zip file) East-West Component (GeoTiff format, 90Mb zip file) 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. Acknowledgment We thank ESA’s Geohazards Thematic Exploitation Platform for prompt dissemination of Sentinel-1B data. Credit Cite results as: "Petar Marinkovic and Yngvar Larsen, (2016). Mapping and analysis of the Central Italy Earthquake (2016) with Sentinel-1 A/B interferometry. Zenodo, DOI 10.5281/zenodo.61133. Results Description: ’VISSO’ Quakes Central Italy was hit by two powerful earthquakes (M5.5 and M6.1) just two hours apart on the night of October 26, 2016. Mountain villages suffered extensive damage and the town of Ussita being completely "flattened". The epicentre of both earthquakes was near the town of Visso in the central Marche region, close to where nearly 300 people were killed by a devastating quake in August (see the section above). InSAR We computed a set of coseismic Sentinel-1A/B interferograms, over the affected area. Ascending track 117: 2016-10-27 / 2016-10-15 Ascending track 117: 2016-11-01 / 2016-10-26 Ascending track 44: 2016-11-02 / 2016-10-27 Descending track 22: 2016-11-01 / 2016-10-26 Download section Ascending Interferogram, Track 117 (27-Oct / 15-Oct): Goldstein filtered wrapped interferometric phase (KMZ format) Ge-coded Goldstein filtered wrapped interferogram (GeoTiff format, 60Mb zip file) Burst overlaps phase (KMZ format) Ascending Interferogram, Track 117 (01-Nov / 26-Oct): Goldstein filtered wrapped interferometric phase (KMZ format) Ge-coded Goldstein filtered wrapped interferogram (GeoTiff format, 58Mb zip file) Ascending Interferogram, Track 44 (01-Nov / 27-Oct): Goldstein filtered wrapped interferometric phase (KMZ format) Ge-coded Goldstein filtered wrapped interferogram (GeoTiff format, 60Mb zip file) Descending Interferogram, Track 22 (01-Nov / 26-Oct): Goldstein filtered wrapped interferometric phase (KMZ format) Ge-coded Goldstein filtered wrapped interferogram (GeoTiff format, 54Mb zip file) 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". + Central Italy Quake mapped by S-1A/B Amatrice, Italy Beijing subsidence mapped by Sentinel-1 July 2016 Results Description Recent reports from scientific and mainstream media have indicated that the city of Beijing, together with its surroundings, is subsiding at fast and alarming rate as result of the overexploitation of groundwater. The depletion of groundwater causes underlying soil to compact, creating a phenomenon called subsidence. The Beijing region has been experiencing this phenomenon since 1935, but in last years the rate of sinking has significantly increased. A team of researchers, within ESA sponsored, SEOM InSARap project performed an interferometric analysis of Copernicus Sentinel-1 data which confirms the reported findings also with current data. While the results speak for themselves, we can just once more reiterate on the usefulness of the Copernicus Programme, in this case for deformation monitoring applications. Analysis Summary Data overview: Sentinel-1 IW Track 47 descending Observation window December 2014 - June 2016 Data download via Scientific Data Hub Processing overview: Time series analysis performed with Small Baseline Subset (SBAS) methodology Interferometric combinations of up to 96 days used Download section Displacement of Beijing observed by Sentinel-1 Mean linear velocity (KMZ format) [DOI: 10.5281/zenodo.5767] Data & Results Terms and Conditions Cite results as: "Petar Marinkovic and Yngvar Larsen, (2016). Subsidence of Beijing (China) mapped by Copernicus Sentinel-1 time series interferometry. Zenodo, DOI: 10.5281/zenodo.5767. All Sentinel-1 results that are available for download are Derived Works of Copernicus data (2014-2016), subject to the following use conditions: "TERMS AND CONDITIONS FOR THE USE AND DISTRIBUTION OF SENTINEL DATA AND SERVICE INFORMATION". + Beijing subsidence mapped by S-1 China, Asia 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: Goldstein filtered wrapped interferometric phase (KMZ format) Interferometric coherence (KMZ format) Burst overlap phase difference (KMZ format) Geo-coded Goldstein filtered wrapped interfeormetric phase (GeoTiff format, 25Mb zip file) Descending Interferogram, Track 163: Goldstein filtered wrapped interferometric phase (KMZ format) Interferometric coherence (KMZ format) Burst overlap phase difference (KMZ format) Geo-coded Goldstein filtered wrapped interfeormetric phase (GeoTiff format, 25Mb zip file) 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". + 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: Wrapped interferometric phase (KMZ format) Wrapped interferometric phase with low coherence areas masked out (KMZ format) Interferometric coherence (KMZ format) Burst overlap phase difference (KMZ format) Geo-coded wrapped interfeormetric phase (GeoTiff format, 35Mb zip file) Geo-coded burst overlap phase difference (GeoTiff format, 2.5Mb zip file) Geo-coded unwrapped interferometric phase, converted to cm (GeoTiff format, 17Mb zip file) Ascending 26.08-19.09 2015 Interferogram: Wrapped interferometric phase (KMZ format) Burst overlap phase difference (KMZ format) Unwrapped interferometric phase (KMZ format) Geo-coded wrapped interfeormetric phase (GeoTiff format, 37.5Mb zip file) Geo-coded burst overlap phase difference (GeoTiff format, 37.5Mb zip file) Geo-coded unwrapped interferometric phase, converted to cm (GeoTiff format, 15.5Mb zip file) Decomposed solution: EW component (KMZ format) Vertical component (KMZ format) EW component (GeoTiff format, 11Mb zip file) Vertical component (GeoTiff format, 11Mb zip file) 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". + 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. 02.Apr - 26.Apr 23.Mar/04.Apr - 28.Apr 17.Apr - 29.Apr 09.Apr - 03.May 21.Apr - 03.May 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 Interferogram in KMZ format 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: 23.Mar - 28.Apr Interferogram in KMZ format 04.Apr - 28.Apr Interferogram in KMZ format 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): Interferogram, phase only, in KMZ format Interferogram, phase intensity mix, in KMZ format Unwrapped interferometric phase in KMZ format Burst overlap phase in KMZ format Range offsets, masked, in KMZ format Azimuth offsets, masked, in KMZ format Wrapped interferogram in GeoTiff format (115Mb) Unwrapped interferogram in GeoTiff format (32Mb) LOS and additional geometry info txt file 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: Interferogram, phase only, in KMZ format 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: Interferogram, phase only, in KMZ format Burst overlap phase in KMZ format 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. 24.Mar - 05.Apr 24.Mar - 17.Apr 31.Mar - 24.Apr 05.Apr - 17.Apr Download links: Interferogram, phase only, in KMZ format 24.Mar - 05.Apr Download links: Interferogram, phase only, in KMZ format 24.Mar - 17.Apr Download links: Interferogram, phase only, in KMZ format 31.Mar - 24.Apr Download links: Interferogram, phase only, in KMZ format 05.Apr - 17.Apr 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". + > 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 Interferogram, phase only, in KMZ format 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". + > Calbuco Volcano monitored by S-1 Calbuco, Chile Archive of Previous Results + > Sentinel-1 TOPS Interferogram August 2014 + > Sentinel-1 DInSAR: Napa Earthquake September 2014 + > Fogo Volcano eruption observed by Sentinel-1 November 2014 + > Sentinel-1 InSAR on a Continental Scale Nov/Dec 2014 + > Sentinel-1 InSAR on a Continental Scale Feb 2015 + > Project in Media (Page Coming Soon) Year 2014 & 2015 Contact Get in touch Questions or just wanna say hello? Send us a message, we’re waiting! Our Project Email Address insar.expert@gmail.com We’re also on social networks Copyright © 2016 InSARap Team B Hungry for some interesting project numbers? + TBs of TOPS Data Processed + Code Commits Algorithmic Iterations + Cups of Coffee Consumed