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Table of Contents Table of Contents General ● Overview ● Definitions ● Supported Products ● Abstracted Metadata DAT ● Display and Analysis Tool Tool Views ❍ Tool Windows ❍ Project View ❍ Product View ❍ Pixel Info View ❍ Image View ❍ Navigation Window ❍ Colour Manipulation ❍ Layer Manager ❍ World Map ❍ WorldWind View ❍ Product Library ❍ Preferences Dialog ❍ Settings Dialog ❍ Wave Mode Polar View Product Readers ❍ Open SENTINEL-1 Product ❍ Open ENVISAT Product ❍ Open ERS (.E1, .E2) Product ❍ Open ERS1/2 CEOS Product ❍ Open JERS CEOS Product ❍ Open Radarsat-1 CEOS Product ❍ Open Radarsat-2 Product ❍ Open TerraSarX Product ❍ Open Cosmo-Skymed Product ❍ Open ENVI Product ❍ Open PolsarPro Product ❍ Open ALOS PALSAR CEOS Product ❍ Open ALOS AVNIR2 CEOS Product ❍ Open ALOS PRISM CEOS Product ❍ Open GeoTIFF Product ❍ Open ImageIO Product ❍ Open BEAM-DIMAP Product ❍ Open LANDSAT 5 TM Product ❍ Open NetCDF Product ❍ Open HDF Product ❍ Open Generic Binary ❍ Open Complex Generic Binary ❍ Open GETASSE30 Tile ❍ Open GTOPO30 Tile ❍ Open ACE DEM Tile ❍ Open SRTM DEM Tile ❍ Import Geometry/Shape Product Writers ❍ Export BEAM-DIMAP Product ❍ Export GeoTIFF Product ❍ Export HDF-5 Product ❍ Export NetCDF Product ❍ Export ENVI GCP File ❍ Export Displayed Image ❍ Export Google Earth KMZ ❍ Export Roi Pixels ❍ Export Transect Pixels ❍ Export Color Palette Imaging Tools ❍ RGB-Image Profile ❍ No Data Overlay ❍ Bitmask Overlay ❍ Bitmask Editor Analysis Tools ❍ Geometry Management ❍ Mask and ROI Management ❍ Product GCP Manager ❍ Product Pin Manager ❍ Product/Band Information ❍ Product/Band Geo-Coding Information ❍ Band Statistics ❍ Band Histogram ❍ Band Scatter Plot ❍ Band Transect Profile Plot ❍ Band Transect Co-ordinate List ❍ Compute ROI-Mask Area Product Generation Tools ❍ Product Subset Dialog ❍ Band Arithmetic ❍ Arithmetic Expression Editor ❍ Reprojection ■ Reprojection Dialog ■ Resampling Methods ❍ Data Flip ❍ Attach Pixel-based Geo-Coding ❍ Create Elevation Band ❍ Create Filtered Band ❍ Complex to Detected Ground Range Graph Processing ● Introduction Graph Tools ❍ Graph Processing Tool ❍ Command Line Reference ❍ Graph Builder Tool ❍ Batch Processing Analysis Operators ❍ Principle Component Analysis ❍ EM Cluster Analysis ❍ K-Means Cluster Analysis ❍ Data Analysis Utility Operators ❍ Create Stack ❍ Create Subset ❍ Band Arithmetic ❍ Convert Datatype ❍ Over Sample ❍ Under Sample ❍ Fill DEM Hole ❍ Image Filtering SAR Operators ❍ Apply Orbit Correction ❍ Calibration ❍ Remove Antenna Pattern ❍ GCP Selection ❍ Multilook ❍ Speckle Filter ❍ Multi-Temporal Speckle Filter ❍ Warp ❍ WSS Deburst ❍ WSS Mosaic ❍ S1 TOPSAR Deburst and Merge Geometry Operators ❍ Create Elevation ❍ Range Doppler Terrain Correction ❍ SAR Simulation Terrain Correction ❍ SAR Simulation ❍ Geolocation Grid Ellipsoid Correction ❍ Average Height RD Ellipsoid Correction ❍ Map Projection ❍ Slant Range to Ground Range ❍ Mosaic InSAR ❍ Interferometric functionality ❍ Computation and subtraction of 'flat earth' phase ❍ Estimation and subtraction of topographic phase ❍ Coherence estimation ❍ Azimuth filtering ❍ Range filtering ❍ Phase filtering ❍ Slant to height ❍ Differential InSAR ❍ Unwrapping ❍ Snaphu Data Export ❍ Snaphu Data Import ❍ InSAR Stack Overview Ocean Tools ❍ Object Detection ❍ Oil Spill Detection ❍ Create Land Mask ❍ Wind Field Estimation Development ● General Design ● Detailed Design ● Open Source Development ● Building the Source ● Developing a Reader ● Developing a Writer ● Developing an Operator Tutorials ● Remote Sensing ● Quick Start With The DAT ● Coregistration ● Orthorectification ● Command Line Processing F.A.Q. ● Installation ● General NEST Overview Next ESA SAR Toolbox Overview The Next ESA SAR Toolbox (NEST) is an open source (GNU GPL) toolbox for reading, post- processing, analysing and visualising the large archive of data (from Level 1) from ESA SAR missions including ERS-1 & 2, ENVISAT and in the future Sentinel-1. In addition, NEST supports handling of products from third party missions including JERS-1, ALOS PALSAR, TerraSAR-X, RADARSAT-1&2 and Cosmo-Skymed. NEST has been built using the BEAM Earth Observation Toolbox and Development Platform. Architecture Highlights ● Display and Analysis Tool (DAT): integrated graphical user-friendly interface ● 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 ● Compatibility with PolSARpro Toolbox (Reader, Writer) NEST is being developed by Array Systems Computing Inc. of Toronto Canada under ESA Contract number 20698/07/I-LG. InSAR functionalities are being developed by PPO.labs and Delft University of Technology. Supported Product Formats: SAR Data Products ❍ 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 For further details on which products are support, please see the Supported_Mission- Product_vs_Operators_table.xls Source Code The complete NEST software has been developed under the GNU public license and comes with full source code in JavaTM. An Application Programming Interface (API) is provided with NEST 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 NEST is programmed in Java™ to allow a maximum portability. The NEST software has been successfully tested under MS Windows™ XP®, Vista and 7 as well as under Linux, Solaris® and Mac OS X operating systems. Definitions, Acronyms, Abbreviations Definition of Terms Product An object that contains remote sensing data for a scene on the earth. A product can contain meta-data, geo-coding information, tie-point grids and bands. All band raster datasets within a product have the same pixel resolution and share the same geo-coding. Band A raster dataset of a product. The band's sample values are usually the measurements of a sensor. Tie-point grid An auxiliary (geophysical) raster dataset of a product. Tie-point grids usually provide less sample values than a band. Missing values, with respect to the full pixel resolution of a product, are obtained by a linear interpolation. The tie-point grid data normally does not originate from the sensor which provided the product's measurement data. Geo-Coding Provides the geodetic co-ordinates for a given pixel of a product. An image is geo-coded if it is somehow possible to find the geographical latitude and longitude values for any pixel. ENVISAT products store their geo-coding information in the tie-point grids named latitude and longitude. If a product has been map transformed, it is known to be geo-referenced and as such, tie-point information is no longer required. Geo-Reference An image is geo-referenced if any point in the image can be found in a corresponding reference map by a linear transformation. Every pixel in the image has the same size if expressed in map units. Geo-referencing a geo- coded image includes image warping, applying a well known map projection and pixel re-sampling. Map Graphic representation of the physical features (natural, artificial, or both) of a part or the whole of the Earth's surface, by means of signs and symbols or photographic imagery, at an established scale, on a specified projection, and with the means of orientation indicated. Map Projection Orderly system of lines on a plane representing a corresponding system of imaginary lines on an adopted terrestrial or celestial datum surface. Also, the mathematical concept for such a system. For maps of the Earth, a projection consists of a graticule of lines representing parallels of latitude and meridians of longitude or a grid. Graticule Network of parallels and meridians on a map or chart. A geographic graticule is a system of coordinates
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