P-SBAS Sentinel-1 processing on-demand by CNR-IREAP-SBAS InSAR Sentinel-1 TOPS (GEP)P-SBAS stands for Parallel Small BAseline Subset and it is a DInSAR processing chain for the generation of Earth deformation time series and mean velocity maps. Input: SLC (Level-1) Sentinel-1 data. Output: LOS Displacement time series; Mean LOS Velocity; Temporal Coherence; Average scatterer elevation (Topography). Output Format: CSV.
(The service can also generate wrapped and unwrapped interferograms that are delivered in geoTiff format).EO sources supported. (Default) LOS Displacement time series; Mean LOS Velocity; Temporal Coherence; Average scatterer elevation (Topography).
Furthermore, persistent scatterer interferometry synthetic aperture radar. Analysis approach and is called the small baseline subset (SBAS) 11, 12. Around each PSC into sub-areas; (3) selecting the closest PSCs around a PSC in all. In this network, if the distance between two PSs is less than a given.
Format: CSV. (Upon request) Wrapped Interferograms; Unwrapped Interferograms; Spatial coherence; Map of LOS vector. 1.2 Select the files to processInput SAR data selection must be carried out with particular care, since a wrong data selection can result to an unfeasible processing. The algorithm accepts as inputs IW Sentinel-1 SLC (level 1) data. RAW data cannot be processed. It is very important that the user selects images related to the same track only which must be aquired with the same mode (the IW one).
The system automatically discards duplicated (reprocessed) images and correctly mosaicks SAR data belonging to different “portions” (slices) of the same strip. In case of reprocessed (duplicated) images the newest one is selected. Note that to obtain reliable displacement measurements and to avoid processing failures, it is strongly suggested to select a number of epochs greater then 20 in the case of time series generation mode. NoteLatitude of the Reference Point and Longitude of the Reference Point are the Latitude and Longitude coordinates (in decimal degrees) of the reference point for the P-SBAS DInSAR measurement. It should be located in a stable area or its deformation behaviour shall be known.
In any case, the user shall verify that input Latitude and Longitude coordinates are on land and included within the selected Area of Interest (if any, see next step). As a suggestion, urbanized areas are usually well suitable to locate the reference point. Moreover, it is in general a good practice to put the reference point in the deformation far field. The Magic Wand button can be used to automatically fill these fields with the coordinate values of a Marker placed on the map. Leave the Bounding Box untouched (Area of Interest empty).
NoteIf set, the system automatically processes the identified AoI. Format: LL-Lon, LL-Lat, UR-Lon, UR-Lat. The Magic Wand button can be used to automatically fill this field with the bounding coordinate values of a rectangle drawn on the map.
Different slices covering the AoI are automatically merged. It is recommended to avoid processing very small areas to allow the system to correctly estimate the co-registration shifts needed by the TOPS mode. The suggested smallest area spans at least 4 S1 bursts, which approximately corresponds to about 80 km along azimuth. As Polarization type. Conventions and assumptionsResults are provided in the satellite Line Of Sight (LOS).
Positive values indicate that the target moves toward the satellite.Processing results are provided according to the specifications along with the corresponding metadata.Published ResultsThe main outputs of the MTA mode are the:. Displacement Time series in LOS;. Mean LOS velocity;.
Temporal coherence;. Pixel location (coordinates);. LOS unit vectors.Information is organized in a CSV ASCII table according to the following figure.
DTSLOS. 1.6 MetadataMetadata are provided according to the EPOS specifications. 2.2 Select the files to processInput SAR data selection must be carried out with particular care, since a wrong data selection can result to an unfeasible processing. The algorithm accepts as inputs IW Sentinel-1 SLC (level 1) data.
RAW data cannot be processed. It is very important that the user selects images related to the same track only which must be aquired with the same mode (the IW one). The system automatically discards duplicated (reprocessed) images and correctly mosaicks SAR data belonging to different “portions” (slices) of the same strip. In case of reprocessed (duplicated) images the newest one is selected.For this tutorial, a pre-defined has been prepared to speed up the data selection step. Browse the Data Packages looking for Amatrice IFG S1 T22 package and click on the load button to upload it. Conventions and assumptionsResults are provided in the satellite Line Of Sight (LOS).
Positive values indicate that the target moves toward the satellite.Processing results are provided according to the specifications along with the corresponding metadata.Published ResultsThe IFG mode outputs are provided in geoTiff standard and consist in:. geocoded interferograms (filtered and not filtered according to the Goldstein method);. geocoded spatial coherence maps.The spacing of the output depends on the DEM used for the processing.
Results are provided in WGS84 geographic projection.File name convention is as follows.where:. can be: InW (Wrapped Interferogram), InU (Unwrapped Interferogram) (this feature will be available in a later release of the service), Coh (Spatial Coherence);. date of the Master acquisition in the format, where is a 3-char code that identifies the sensor. 3 FeedbacksUsers are kindly invited to report any issue and problem encountered during the use of the P-SBAS service:. For GEP on-boarded users, by issuing a ticket from their project support space on. For other signed-in GEP users, by sending an email to the SBAS support team [email protected], suggestions and comments about the GEP service delivery are warmly welcomed on [email protected] in order to keep the service delivery on GEP as much as possible appealing, effective and efficient. 4 Terms and ConditionsIPRThe Intellectual Property Right (IPR) of the available software, tools and services developed are with CNR-IREA, if not differently specified.UseCNR-IREA services are available to all the GEP users according to a.The access to CNR-IREA services is free of charge and users are not asked to pay any fee or subscription by CNR-IREA.
There is the possibility that users participate to the cost of service maintenance and operation: these costs are defined case-by-case among CNR-IREA, the platform operator and ESA. No cost can be required to users for the CNR-IREA services without the approval of CNR-IREA.ResultsThe results (including products, maps, time series, files and everything generated by the processors) of the services are available under the.Warranty and liabilityCNR-IREA software is a scientific software and it is provided at the best CNR-IREA knowledge according to the SAR interferometry state-of-the-art. No warranty is provided on the processors and services of CNR-IREA. CNR-IREA is not responsible for any software inaccuracies, bugs, errors and misuse.Generated results have a defined accuracy according to the relevant scientific publications available in literature. Result accuracy is estimated on a statistical basis. Provided results are not validated by CNR-IREA and, indeed, it is user responsibility to validate them.CNR-IREA is not responsible for the use, quality, accuracy and interpretation of results and products that are generated by using the processors and services provided within the platform. CNR-IREA is not responsible for the use, quality, accuracy and interpretation of third party results, products and services derived from the use of CNR-IREA’s processors and services.
CNR-IREA is not responsible of possible outages of the provided services. CNR-IREA is not responsible of any kind of third party loss derived from service outage, result inaccuracies, software errors of the provided services and products.The maintenance, update and user support are provided by CNR-IREA free of charge and at best effort. CNR-IREA is not responsible for any consequence derived from delays on replies to user requests or support inaccuracies.
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