SNAP-Sentinel-1 in a Nutshell

Transcription

1 SNAP-Sentinel-1 in a Nutshell Dr. Andrea Minchella 1 st ESA Advanced Training Course on Remote Sensing of the Cryosphere 13 September 2016, University of Leeds, Leeds, UK

2 What is SNAP? Credit: SNAP The Sentinels Application ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

3 Sentinel Toolboxes Consortia Credit: SNAP The Sentinels Application ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

4 Toolbox Evolution Credit: SNAP The Sentinels Application ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

5 Toolbox Evolution Credit: SNAP The Sentinels Application ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

6 Architecture Highlights Java, Python implementation Snap desktop: integrated graphical user-friendly interface; Snap engine (Graph Processing Tool): core and command line interface; Graphical or command-line execution; Tiled memory management for working with very large data products; Data abstraction models to handle all SAR missions in a common way Modular design for easy modifications and upgrades Users are able to add their own modules via APIs Multithreading and Multi-core processor support Integrated WorldWind visualisation

7 Supported Platforms and Source Code Repository 32bit/64bit Windows (XP, Vista, 7, 8, 10) Linux Mac OS X Credit: Sentinel-1 Toolbox Open Source Tools for EOScience ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

8 Graph Processing Tool Credit: SNAP The Sentinels Application ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

9 SNAP Applicaton Modes Credit: SNAP The Sentinels Application ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

10 Generic Functions and Tools Credit: SNAP The Sentinels Application ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

11 STEP (Science Toolbox Exploitation Platform) EO Science collaborative platform SNAP software download SNAP tutorials and documentation Technical forum and community animation Gathering user feedback and usage Credit: SNAP The Sentinels Application ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

12 Example of Sentinel-1 data processing Sentinel-1 toolbox architecture: data flow Snap desktop (GUI) Integrated graphical user interface for SAR data visualisation, analysis and processing Sentinel-1 ENVISAT ASAR ERS-1&2 Radarsat-2 Cosmo-SkyMed TerraSAR-X Tandem-x ALOS PALSAR1&2 Radarsat-1 Readers Generic Product Model (GPM) Writers Beam dimap Geotiff Netcdf Envi Generic Binary Google Earth PolSARpro etc JERS SAR Graph Processing Tool (GPT) For command line execution of user-defined batch processing chains Classification:

13 Generic Functions and Tools Statistics & Data Analysis Metadata handling Subset, Resample and Band Arithmetic Export to GeoTiff, HDF 4 & 5, NetCDF, Bynary, Envi, Kmz formats LUT and Layer Management ROI tools, layer stacking.

14 Main SAR Functionality Left and right facing missions displayed by start time and near range Absolute calibration Multilooking speckle (single and multitemporal) filtering Precise orbit handling (Doris, Prare and Delft orb.) Coregistration of detected and complex products Debursting of ASAR WSS Range-Doppler Terrain Correction Radiometric normalization during Terrain Correction SAR simulation Layover and shadow masks Simulated SAR Terrain Correction Ellipsoid correction, Map Reprojection, Mosaicking Automatic DEM download and tile selection Product library for scanning and cataloguing large archives efficiently

15 Main SAR Functionality - SAR Applications: Ø Ocean tools: basic routines for oil spill detection, ship detection and wind field estimation from SAR data Ø Urban Areas: Speckle Divergence Ø Offset tracking Ø Change detection - Inteferometry for Strimap and Zero-Doppler focused data - Compatibility with ESA PolSARpro Toolbox (Reader, Writer) Level of support depends on sensor & product type. Please refer to documentation for full details such as the Operators help

16 Ocean Tools Object (ship) Detection Oil Spill Detection Wind Field Estimation Create Land Mask Land Masked Detection Map Projected

17 InSAR Architecture Highlights Coregistration and resampling DEM assisted coregistration Products: interferogram and coherence Filtering: both spectral and phase Geo-coding Unwrapping via 3rd party sw (SNAPHU) Phase to height conversion Differential InSAR Cross InSAR (ERS-ENVISAT) Only zero doppler and strip map data are fully supported

18 New Sentinel-1 Functionality Calibration Thermal Noise Removal Slice Assembly TOPSAR Deburst and Merge GRD Border Noise Removal TOPSAR Interferometry

19 New Level-2 OCN Visualisation Credit: Sentinel-1 Toolbox Open Source Tools for EOScience ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

20 Polarimetric Tools Quad Pol Decompositions Sinclair Pauli Freeman-Durden Van Zyl Yamaguchi Cloude H/A Alpha Touzi Dual Pol Decomposition H/A Alpha

21 Quad Pol & Dual Pol Functionality Credit: SNAP The Sentinels Application ESA EO SCIENCE 2.0 Workshop, October 2015, ESA-Esrin, Frascati, Rome (Italy)

22 The Product Library Convenient browsing and importing of products having information and Quick Look product Now handles optical products and S-1 L2 OCN products

23 Any Question?