S1TBX Overview

SENTINEL-1 Toolbox

Overview

The Sentinel-1 Toolbox (S1TBX) is an open source (GNU GPL) toolbox consisting of a collection of processing tools, data product readers and writers and a display and analysis applications to support the large archive of data from ESA SAR missions including Sentinel-1, ERS1 & 2 and ENVISAT, as well as third party SAR-data from ALOS PALSAR, TerraSAR-X, Cosmo-Skymed and RADARSAT-2. S1TBX has been built using the SeNtinels Application Platform (SNAP) making it compatible with the SENTINEL-2 and SENTINEL-3 Toolboxes and incorporating tools for multispectral optical products. The Toolbox is composed of a Display and Analysis Tool (DAT) and various processing tools that could be run independently from the command-line and also integrated within the graphical user interface. The Toolbox includes tools for calibration, speckle filtering, coregistration, orthorectification, mosaicking, data conversion, polarimetry and interferometry.

Architecture Highlights

• Graph Processing Framework (GPF): user-defined processing chains
• 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

Main Features

• Statistics & Data Analysis
• Metadata handling
• Subset, Resample and Band Arithmetic
• Export to GeoTiff, HDF 4 & 5, NetCDF, Binary, Envi, Kmz formats
• LUT and Layer Management
• ROI tools, layer stacking
• Absolute calibration (Envisat ASAR, ERS 1&2, ALOS, RADARSAT-2, TerraSAR-X, Cosmo-SkyMed)
• Multilooking & speckle (single and multitemporal) filtering
• ERS-ASAR 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 SRTM DEM download and tile selection 
• Product library for scanning and cataloguing large archives efficiently
• Ocean tools: basic routines for oil spill detection, ship detection and wind field estimation from SAR data
• Fully integrated and featured InSAR processor (JLinda) for Stripmap and Zero-Doppler focused data
• Polarimetric tools for decompositions and classification
• Compatibility with PolSARpro Toolbox  (Reader, Writer)

Supported Product Formats:

SAR Data Products

• Sentinel-1
• ENVISAT ASAR, MERIS, AATSR
• ERS AMI 1 & 2 (CEOS & Envisat format from PGS and VMP)
• JERS SAR
• ALOS PALSAR
• ASAR Wave Products
• RADARSAT 1
• RADARSAT 2
• TerraSar-X
• Cosmo-Skymed

Common EO Data Formats

• DIMAP
• GeoTIFF
• HDF 4 & HDF 5
• NetCDF
• ENVI
• PolsarPro
• Generic Binary                

Digital Elevation Models

• SRTM
• ASTER Global DEM
• ACE
• GETASSE30
• GTOPO30 tiles

Source Code

The complete S1TBX software has been developed under the GNU public license and comes with full source code in Java.

An Application Programming Interface (API) is provided with S1TBX to allow easy extension by users to add new data readers/writers of other formats and to support data formats of future missions. Plug-in modules can be developed separately and shared by the user community. Processors can be easily extended without needing to know about the complexities of the whole software.

Supported Platforms

S1TBX is programmed in Java™ to allow a maximum portability. The S1TBX software has been successfully tested under MS Windows™ XP^®, Vista, 7 and 8 as well as under Linux, and Mac OS X operating systems.