NEST (Next ESA SAR Toolbox) User Training Course

1
NEST (Next ESA SAR Toolbox) User Training
Course

• Prepared by
• Luis Veci, Andrea Minchella and Marcus Engdahl

2
USER TRAINING COURSE

• NEST basic training
• Introduction to the NEST project
• Introduction
• NEST Installation
• Approaching the data
• The Display and Analysis Tool
• How to access data
• How to create a Project
• Basic SAR Tools
• Subset
• Apply Orbit File
• Radiometric calibration
• Coregistration
• Speckle filtering
• Advanced SAR Tools
• Multilooking

3
NEST TEAM

• ESA
• Marcus Engdahl
• Andrea Minchella
• Romain Husson
• Array Systems Computing
• Rajesh Jha
• Luis Veci
• Jun Lu
• Shengli Dai
• PPO.labs
• Petar Marinkovic
• TU Delft
• Ramon Hanssen
• Brockmann Consult
• Norman Fomferra
• Marco Peters

4
ARRAY SYSTEMS COMPUTING INC.
RADAR SONAR Parallel Processing
5
NEST INTRODUCTION

• NEST (Next ESA SAR Toolbox ) is a user friendly
  open source Java application for exploitation of
  Level 1 and above SAR data.
• NESTs primary goal is to read in ESA and third
  part SAR data products, provide tools for
  calibration, orthorectification, co-registration,
  interferometry, reprojection, mosaicking, image
  filtering and data manipulation, and then convert
  the data into common file formats used by other
  3rd party SAR software.

6
NEST USER COMMUNITY
NEST Website Visits

• NEST Users
• 2000 Registered Users
• 268417 Total Page Views

• 14 United States
• 11 Italy
• 9 Unresolved/Unknown
• 6 Germany
• 6 China
• 6 Canada
• 5 Great Britain
• 3 Brazil
• 3 Spain
• 3 France
• 3 Netherlands
• 3 Russian Federation
• 2 Czech Republic
• 2 Austria
• 2 Poland
• 2 Greece
• 2 Sweden
• 2 India
• 1 Australia

7
SUPPORTED SAR MISSIONS

• NEST supports the following SAR missions
• ALOS PALSAR,
• ENVISAT ASAR,
• ERS-1,
• ERS-2,
• Radarsat-1,
• Radarsat-2
• JERS SAR,
• TerraSAR-X (except SCC)
• Cosmo skymed (coming soon)
• NEST supports common EO formats
• GeoTIFF, HDF 4 5, NetCDF, CEOS

8
PROCESSING TOOLS

• NEST Provides both basic and advanced SAR tools
• Data Conversion and Export
• Calibration
• Resampling
• Band Arithmetic
• Image Filtering
• Speckle Filtering
• Statistics Data Analysis
• Reprojection
• Mosaicking
• Layer Management
• Tiled Memory
• Vector Shape Layers
• Web Map Service (WMS) layers
• NASA WorldWind Integration

• Image Co-Registration
• Orbit Correction
• Orthorectification
• Automatic import of 90m SRTM DEM
• Range Doppler
• Simulated SAR Image
• Image Analysis
• Principle Component Analysis
• EM Cluster Analysis
• KMeans Cluster Analysis
• Basic SAR Ocean Tools
• Oil Spill Detection
• Wind Field Estimation
• Object Detection

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DISPLAY AND ANALYSIS TOOLS

• Display and Analysis Tool (DAT)
• Clear and intuitive user interface
• Product Views
• World Maps
• Readouts
• Histograms
• Colour Management
• Flexible management of products
• Organize your work how you like it

10
GRAPH PROCESSING

• The Graph Builder allows the user to assemble
  graphs from a list of available operators and
  connect operator nodes to their sources
• Create your own processing chains
• Executed from command line or from the GUI
• Allows for very large images using Tiled Memory
  Management

gt Graph Builder
11
INSTALLATION
Please download the NEST software from
http//earth.esa.int/nest

• Please install the software on your laptops and
  follow along with the exercises
• If youve already installed the latest version of
  NEST then you dont need to install it.
• If not, uninstall any previous version of NEST
  first
• Use the installation program appropriate for your
  system
• Windows 32 bit or 64 bit
• Linux 32 bit or 64 bit
• Mac OS X

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WINDOWS OS INSTALLATION

• Run the NEST Windows Installer and follow the
  instruction

• Enter the path to the destination folder
• Press Next

• Click on I accept the agreement for the GNU GPL
  License
• Press Next

Finally run the nest-dat.exe application double
clicking on
13
LINUX OS INSTALLATION

• Uninstall any previous version of NEST first
• Run the Linux installer
• From the command prompt go to the installation
  folder and run the dat.sh application

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MAC OS INSTALLATION

• Install J2SE 1.6 for Mac
• Install Java Advanced Imaging for Mac
• Unzip the software to your installation folder
  and run the DAT applicationMac OS X (without
  WorldWind)NEST-3C-bin-mac.dir.zipIf having
  difficultly unzipping on mac, use 7zipYou may
  need to change the permissions on the
  executables
• chmod 755 dat.command
• chmod 755 gpt.command
• To run from the command line, set these
  environment variables in .profile or
  .bash_profile in your home directory
• export NEST_HOMEinstallation folder
• export PATHPATHNEST_HOME

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TROUBLE SHOOTING

• If you have trouble starting the NEST DAT
• Update graphics drivers
• Remove NEST3C/modules/nest-world-wind-view-3C.jar

16
DATASETS
You may download the datasets from http//earth.es
a.int/category/index.cfm?fcategoryid37

• Track Descending 3 ASAR IMP same track and frame
  over LAquila area (Central Italy)
• ASA_IMP_1PNDPA20080427.N1
• ASA_IMP_1PNDPA20080914.N1
• ASA_IMP_1PNDPA20090412.N1
• Track Ascending 1 ASAR IMS over LAquila area
  (Central Italy)
• ASA_IMS_1PNDPA20090504.N1

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DATASETS

• Prestige Oil Spill 1 ASAR WSM
• Sichuan Earthquake Post Earthquake
• 2 ASAR IMP (ASCENDING)
• 1 ASAR IMP (DESCENDING)

The image are also available from the ESA
Geohazard Virtual Archive
http//earth.esa.int/category/index.cfm?fcategoryi
d37
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SETTINGS

• Settings and Paths
• DEMs
• Orbit Files
• Set the DataPath to c\NestData, /NestData or
  where you copied the data folder

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Approaching the Data

1. How accessing data Product readers, Open Raster
   Dataset, Import Browser
2. The Product view product inspection
3. The Product view Navigation Window , LUT
   manipulation, Analysis tool
4. Create a Project

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ACCESSING DATA Open Raster Dataset
C\NestData\Track DESCENDING
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HOW ACCESSING DATA Product Readers
C\NestData\Track DESCENDING
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HOW ACCESSING DATA Import Browser
The Import Browser provides you with a product
preview, so you can easily decide which products
you want to open or import.
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HOW ACCESSING DATA Import Browser
After having selected the directories, click on
yes in the following message
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HOW ACCESSING DATA Import Browser
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BEAM DIMAP FORMAT

• NESTs internal file format
• Developed for BEAM
• Original DIMAP from SPOT-Image
• XML metadata
• Flat binary img
• ENVI headers

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HOW ACCESSING DATA Import Browser
Click on
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THE PRODUCT VIEW
After having opened the product, the data is
listed in the Products View where you can examine
product structure and metadata.
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THE PRODUCT VIEW
A Product consists of the following

• Identification Basic information on the product
  (Mission, Product type, Acquisition time, Pass,
  Track and Orbit)
• Metadata This includes all the original metadata
  within the product, the Abstracted Metadata which
  is the important metadata fields used by the
  Operators in a common format and the Processing
  graph history recording the processing that was
  done
• Tie Point Grids Raster grids created from
  interpolating the tie-points information within
  the product. The interpolation is done on the fly
  according to the product.
• Bands The actual bands inside the product and
  virtual bands created by NEST from expressions.
  Different icons are used to distinguish these
  bands.

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THE ABSTRACTED METADATA

• The Abstracted Metadata is an extract of
  information and parameters from the actual
  metadata of the product.
• The readers convert product specific metadata
  into this common format for all Operators to
  understand
• The Abstracted Metadata is the only metadata
  that an Operator should use and update.

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NAVIGATION WINDOW

• Zoom In
• Increase the magnification
• Zoom Out
• Decrease the magnification
• Zoom Actual Pixel
• Sets the zoom factor to the default value so that
  the size of an image pixel has the same size of a
  display pixel.
• Zoom All
• Adjust the magnification so that the whole image
  fits into the image view.
• Synchronize
• All panning and zooming will operate on all open
  image views.

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LUT COLOUR MANIPULATION
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Analysis Tools
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Pixel View

• The Pixel View displays pixel information while
  you move the mouse over the band image view.

34
WORLD MAP

• To navigate around the World Map, left click on
  the map and drag to mouse to pan. Use the middle
  mouse wheel to zoom in and out.
• The outline of the currently selected product is
  shown.
• Place names, Nasa's Blue Marble and aerial
  optical data will automatically be downloaded as
  long as your computer is connected to the
  internet.

35
Layer Manager

• When a band is currently opened, you may add new
  layers overlaid over your image
• Layers could be
• Shape Files,
• Images,
• Other bands
• If the product is map projected
• Web Map Server (WMS) layers may be added
• Layer Transparency is user control

36
PROJECTS

• A Project will help organize your data by storing
  all related work in one folder. To create a
  project, select New Project from the File menu or
  Toolbar. A dialog will prompt you for a project
  folder location and project file name.
• Whenever you open a new product, a link to that
  product will show up under External Product
  Links.
• The project folders mirror the file structure of
  the physical hard disk. Therefore any change you
  make to the physical project folders on disk will
  be reflected in your project.

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Basic SAR Tools
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CHAIN 1
ASA_IMP_1PNDPA20080427.N1
Apply orbit file Op
Absolute calibration
ASA_IMP_1PNDPA20080914.N1
Subset Op
ASA_IMP_1PNDPA20090412.N1
Descending Pass Track 79
Coregistration
Multitemporal speckle filtering
Sing. Speckle Filtering
Gamma Map (5x5)
ROI analysis
RGB Visualization
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CHAIN 1 CREATE THE PROJECT
From the New Project dialog, browse for the
folder NestData and enter the project name
Chain1 A new folder called Chain1 will be
created
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CHAIN 1 SUBSET OPERATOR
ASA_IMP_1PNDPA20080427.N1
ASA_IMP_1PNDPA20080914.N1
Subset Op
ASA_IMP_1PNDPA20090412.N1
Descending Pass Track 79
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CHAIN 1 SUBSET OPERATOR
Creation the folder ? SUBSETs folder inside the
project
Right Click on the folder Processed Products
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CHAIN 1 SUBSET OPERATOR 1
Display the image ASA_IMP_1PNDPA20080427.N1
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CHAIN 1 SUBSET OPERATOR 1
From Utilities select ? Create Subset From View
See the Help
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CHAIN 1 SUBSET OPERATOR 1
Save in BEAM DIMAP format
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CHAIN 1 SUBSET OPERATOR 1
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CHAIN 1 SUBSET OPERATOR 2
Display the image ASA_IMP_1PNDPA20080914.N1
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CHAIN 1 SUBSET OPERATOR 2
From Utilities select ? Create Subset From View
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CHAIN 1 SUBSET OPERATOR 2
Save in BEAM DIMAP format
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CHAIN 1 SUBSET OPERATOR 2
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CHAIN 1 SUBSET OPERATOR 3
Display the image ASA_IMP_1PNDPA20090412.N1
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CHAIN 1 SUBSET OPERATOR 3
From Utilities select ? Create Subset From View
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CHAIN 1 SUBSET OPERATOR 3
Save in BEAM DIMAP format
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CHAIN 1 SUBSET OPERATOR 3
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CHAIN 1 APPLY ORBIT FILE OPERATOR
ASA_IMP_1PNDPA20080427.N1
Apply orbit file Op
ASA_IMP_1PNDPA20080914.N1
Subset Op
ASA_IMP_1PNDPA20090412.N1
Descending Pass Track 79
Apply DORIS orbit file for ASAR data
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CHAIN 1 APPLY ORBIT FILE OPERATOR
The orbit file provides accurate satellite
position and velocity information.
Creation the folder ? ORBIT folder inside the
project
Right Click on the folder Processed
Products/SUBSET
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CHAIN 1 APPLY ORBIT FILE OPERATOR
57
CHAIN 1 APPLY ORBIT FILE OPERATOR
Close the 3 original file Right click on the
product name then click close
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CHAIN 1 APPLY ORBIT FILE OPERATOR
Select the subset_ASAR 20080427 and then click on
SAR Tools ? Apply Orbit File
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CHAIN 1 APPLY ORBIT FILE OPERATOR
Select the folder ORBIT
See the Help
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CHAIN 1 APPLY ORBIT FILE OPERATOR
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CHAIN 1 APPLY ORBIT FILE OPERATOR
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CHAIN 1 APPLY ORBIT FILE OPERATOR
Select the subset_ASAR 20080914 and then click on
SAR Tools ? Apply Orbit File
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CHAIN 1 APPLY ORBIT FILE OPERATOR
the folder ORBIT should be already there
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CHAIN 1 APPLY ORBIT FILE OPERATOR
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CHAIN 1 APPLY ORBIT FILE OPERATOR
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CHAIN 1 APPLY ORBIT FILE OPERATOR
Select the subset_ASAR 20090412 and then click on
SAR Tools ? Apply Orbit File
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CHAIN 1 APPLY ORBIT FILE OPERATOR
the folder ORBIT should be already there
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CHAIN 1 APPLY ORBIT FILE OPERATOR
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CHAIN 1 APPLY ORBIT FILE OPERATOR
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CHAIN 1 ABSOLUTE CALIBRATION OP.
ASA_IMP_1PNDPA20080427
Apply orbit file Op
Absolute calibration
ASA_IMP_1PNDPA20080914
Subset Op
ASA_IMP_1PNDPA20090412
Descending Pass Track 79
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WHY CALIBRATE?

• The objective of SAR calibration is to provide
  imagery in which the pixel values can be directly
  related to the radar backscatter of the scene.
• Typical SAR data processing, which produces level
  1 images does not include radiometric corrections
  and significant radiometric bias remains.
  Therefore, it is necessary to apply the
  radiometric correction to SAR images so that the
  pixel values of the SAR images truely represent
  the radar backscatter of the reflecting surface.
• The radiometric correction is also necessary for
  the comparison of SAR images acquired with
  different sensors, or acquired from the same
  sensor but at different times, in different
  modes, or processed by different processors.

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CHAIN 1 ABSOLUTE CALIBRATION OP.
Close the files subset_0_of_ENVISAT-ASA_IMP_1PNDPA
20080427_092431_000000152068_00079_32197_8079.AppO
rb subset_1_of_ENVISAT-ASA_IMP_1PNDPA20080914_0924
29_000000152072_00079_34201_8081.AppOrb subset_2_o
f_ENVISAT-ASA_IMP_1PNDPA20090412_092427_0000001520
78_00079_37207_8080.AppOrb Right click on the
product name then click close
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CHAIN 1 ABSOLUTE CALIBRATION OP.
Select the file subset_0_of_ENVISAT-ASA_IMP_1PNDPA
20080427_092431_000000152068_00079_32197_8079.
.AppOrb Go to SAR Tools ? Radiometric
Correction ? Calibration
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CHAIN 1 ABSOLUTE CALIBRATION OP.
Select the folder Calibrated Product
See the Help
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CHAIN 1 ABSOLUTE CALIBRATION OP.
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CHAIN 1 ABSOLUTE CALIBRATION OP.
Select the file subset_1_of_ENVISAT-ASA_IMP_1PNDPA
20080914_092429_000000152072_00079_34201_8081.AppO
rb Go to SAR Tools ? Radiometric Correction ?
Calibration
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CHAIN 1 ABSOLUTE CALIBRATION OP.
The folder is already the right one
See the Help ASAR - retrocal
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CHAIN 1 ABSOLUTE CALIBRATION OP.
79
CHAIN 1 ABSOLUTE CALIBRATION OP.
Select the file subset_2_of_ENVISAT-ASA_IMP_1PNDP
A20090412_092427_000000152078_00079_37207_8080.App
Orb Go to SAR Tools ? Radiometric Correction ?
Calibration
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CHAIN 1 ABSOLUTE CALIBRATION OP.
2
The folder is already the right one
See the Help ASAR - retrocal
81
CHAIN 1 ABSOLUTE CALIBRATION OP.
7
2
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PROCESSING GRAPH HISTORY
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CHAIN 1 COREGISTRATION OPERATOR
ASA_IMP_1PNDPA20080914.N1
Apply orbit file Op
Absolute calibration
ASA_IMP_1PNDPA20090412.N1
Subset Op
SAR_IMP_1PXESA20090517.E2
Descending Pass Track 79
Coregistration
RGB Visualization
84
Coregistration

• Images obtained from different measurements may
  be co-registered such that the data is
  transformed into one coordinate system.
• NEST will accurately co-register two or more
  input images by spatial registration and
  resampling to correct translational, rotational
  and scale differences.
• One image is selected as the master image while
  the others are slave images. Correlation metrics
  are used to automatically relate the slave images
  to the master image.

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Coregistration
March (Red)
ALOS PALSAR HV Amazon 2007
April (Green)
RGB
July (Blue)
86
CHAIN 1 COREGISTRATION OPERATOR
Close the files leaving only the calibrated
products opened (Right click on the name file
name then click close)
87
CHAIN 1 COREGISTRATION OPERATOR
Go to SAR Tools ? Coregistration ? Full
Coregistration
88
CHAIN 1 COREGISTRATION OPERATOR
Click and drag from the Products View to the
ProductSet-Reader The same action can be done
from the project view
See the Help
89
CHAIN 1 COREGISTRATION OPERATOR
90
CHAIN 1 COREGISTRATION OPERATOR
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CHAIN 1 COREGISTRATION OPERATOR
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CHAIN 1 COREGISTRATION OPERATOR
Select the folder Coregistered Products
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CHAIN 1 COREGISTRATION OPERATOR
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CHAIN 1 RGB Visualization
Right click on the file name
95
CHAIN 1 FROM LINEAR TO DB
Right click on the band name
96
CHAIN 1 RGB Visualization
Visualization of Coregistered stack sigma0 in
db scale
97
CHAIN 1 RGB COMPARISON
Coregistered stack sigma0 in db scale
Coregistered stack sigma0 in linear scale
98
CHAIN 1 SPECKLE FILTER SINGLE PRODUCT
ASA_IMP_1PNDPA20080427
Apply orbit file Op
ASA_IMP_1PNDPA20080914
Absolute calibration
Subset Op
ASA_IMP_1PNDPA20090412
Descending Pass Track 79
Coregistration
Sing. Speckle Filtering
Gamma Map (5x5)
RGB Visualization
99
Speckle Filtering

• Speckle is caused by random constructive and
  destructive interference

100
CHAIN 1 SPECKLE FILTER SINGLE PRODUCT
Leave open only Coregistered stack sigma0
101
CHAIN 1 SPECKLE FILTER SINGLE PRODUCT
Create a new folder into the project
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CHAIN 1 SPECKLE FILTER SINGLE PRODUCT
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CHAIN 1 SPECKLE FILTER SINGLE PRODUCT
Go to SAR Tools ? Speckle Filtering ? Single
Product
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CHAIN 1 SPECKLE FILTER SINGLE PRODUCT
Select the folder SINGLE SPECKLE FILTERING
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CHAIN 1 SPECKLE FILTER SINGLE PRODUCT
See the HELP
106
CHAIN 1 BAND ARITHMETIC

• Create real bands or virtual bands derived from
  existing bands
• Construct arithmetic expressions using
  conditional, comparison, and arithmetic operators
  as well as mathematical functions

107
CHAIN 1 BAND ARITHMETIC
AVERAGE AFTER SPECKLE FILTERING
108
CHAIN 1 AVERAGE AFTER SPECKLE FILTERING
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CHAIN 1 RGB COMPARISON
Speckle filtered image is cleaner but loses
resolution
Coregistered stack sigma0 after speckle
filtering in db scale
Coregistered stack sigma0 in db scale
110
CHAIN 1 MULTITEMPORAL SPECKLE FILTERING
ASA_IMP_1PNDPA20080427.N1
Apply orbit file Op
Absolute calibration
ASA_IMP_1PNDPA20080914.N1
Subset Op
ASA_IMP_1PNDPA20090412.N1
Descending Pass Track 79
Coregistration
Multitemporal speckle filtering
Sing. Speckle Filtering
Gamma Map (5x5)
ROI analysis
RGB Visualization
111
CHAIN 1 MULTITEMPORAL SPECKLE FILTERING
Close the files leaving only the Coregistered
stack-sigma0 opened (Right click on the product
andthen click Close All Others)
112
CHAIN 1 MULTITEMPORAL SPECKLE FILTERING
Create a new folder into the project
113
CHAIN 1 MULTITEMPORAL SPECKLE FILTERING
114
CHAIN 1 MULTITEMPORAL SPECKLE FILTERING
Go to SAR Tools ? Speckle Filtering ?
Multi-temporal Products
115
CHAIN 1 MULTITEMPORAL SPECKLE FILTERING
Select the folder MULTI-TEMP SPECKLE FILTERING
116
CHAIN 1 RGB COMPARISON
Single image speckle filtering (sigma0) in db
scale
Multi-temporal speckle filtering (sigma0) in db
scale
117
CHAIN 1 ROI ANALYSIS
ASA_IMP_1PNDPA20080427.N1
Apply orbit file Op
Absolute calibration
ASA_IMP_1PNDPA20080914.N1
Subset Op
ASA_IMP_1PNDPA20090412.N1
Descending Pass Track 79
Coregistration
Multitemporal speckle filtering
Sing. Speckle Filtering
Gamma Map (5x5)
RGB Visualization
ROI analysis
118
CHAIN 1 ROI ANALYSIS
The objective evaluating how the sigma0 varies
during the time over an agriculture field
For instance this orange field is the area on
which we want evaluate the variation of sigma0
119
CHAIN 1 ROI ANALYSIS
The objective evaluating how the sigma0 varies
during the time over an agriculture field
120
CHAIN 1 ROI ANALYSIS
Close the files leaving only the Coregistered
stack-sigma0-Spk_MultiTemp (Right click on the
name file then click Close All Others)
121
CHAIN 1 ROI ANALYSIS
Zoom to the corner bottom left
This orange field is the area on which we want
see how the sigma0 varies during the time
122
CHAIN 1 LAUNCH THE ROI MANAGER
View ? Tool Windows? ROI Manager
123
CHAIN 1 ROI ANALYSIS
Click on
124
CHAIN 1 ROI ANALYSIS

• Draw the polygon
• 1) Close it with double clicking
• 2) Click on Apply

125
CHAIN 1 ROI ANALYSIS
Click over Apply other bands
126
CHAIN 1 INFORMATION DIALOG
Open the INFORMATION DIALOG
127
CHAIN 1 INFORMATION DIALOG
Select the next band
128
CHAIN 1 INFORMATION DIALOG
Select the next band
129
CHAIN 1 SIGMA0 VARIATION
Mean Sigma0 0.72090 Std-Dev 0.2831
ASA_IMP_1PNDPA20080427.N1
Mean Sigma0 0.36556 Std-Dev 0.1242
ASA_IMP_1PNDPA20080914.N1
Mean Sigma0 0.1307769 Std-Dev 0.08419
ASA_IMP_1PNDPA20090412.N1
130
CHAIN 1 SIGMA0 VARIATION
Date Linear value db
27/04/2008 0.7209 -1.421
14/09/2008 0.36556 -4.37
12/04/2009 0.1307769 -8.835
131
Advanced SAR Tools
132
ORTHORECTIFICATION

• Due to topographical variations of a scene and
  the tilt of the satellite sensor, distances can
  get distorted in the SAR images. Image data not
  directly at the sensors Nadir location will have
  some distortion.
• Terrain corrections are intended to compensate
  for these distortions so that the geometric
  representation of the image will be as close as
  possible to the real world.
• NEST uses the available orbit state vector
  information, the radar timing annotations, the
  slant to ground range conversion parameters
  together with the reference DEM data to derive
  the precise geolocation information. 

133
SAR GEOMETRIC EFFECTS
134
ORTHORECTIFICATION
DEM
SAR Geometry
Terrain Correction
135
CHAIN 2
SARSIM Terrain correction and Radiometric
correction
Layer STACK
Subset Op
ASA_IMP_1PNDPA20090412.N1
Terrain correction and Radiometric normalization
Apply orbit file Op
RGB Visualization
Ellipsoid correction RD
136
CHAIN 2
Create a folder called CHAIN2 within C\NestData
137
CHAIN 2 OPEN THE PRODUCT

• Open ASA_IMP_1PNDPA20090412.N1 from the folder
• C\NestData\Track DESCENDING\Track DESCENDING
• Open Amplitude band
• Zoom in on LAquila

138
CHAIN 2 CREATE SUBSET

• From the Utilities menu select
• Create Subset From View

139
CHAIN 2 CREATE SUBSET

• From the Utilities menu select
• Create Subset From View

140
CHAIN 2 SAVE SUBSET
Save in the subset in beam dimap format
141
CHAIN 2 APPLY ORBIT FILE

• From the SAR Tools menu select
• Apply Orbit File

142
CHAIN 2 APPLY ORBIT FILE
143
CHAIN 2 SAR SIMULATION TERRAIN CORRECTION
Subset Op
SIM Terrain correction and Radiometric correction
ASA_IMP_1PNDPA20090412.N1
Apply orbit file Op
144
CHAIN 2 SAR SIMULATION TERRAIN CORRECTION

• From the Geometry menu, select
• Terrain Correction -gt SAR-Simulation Terrain
  Correction

145
CHAIN 2 SAR SIMULATION

• In the SAR-Simulation tab
• Select Amplitude band
• SRTM 3Sec DEM

146
CHAIN 2 SAR SIM TERRAIN CORRECTION

• In the SAR-Sim Terrain Correction tab
• Apply Radiometric Normalization
• Press Run

147
CHAIN 2 SAR SIMULATION
148
CHAIN 2 GRAPH BUILDER
SIM Terrain correction and Radiometric correction
Layer STACK
Subset Op
ASA_IMP_1PNDPA20090412.N1
Terrain correction and Radiometric normalization
Apply orbit file Op
RGB Visualization
Ellipsoid correction RD
Using the Graph Builder
149
CHAIN 2 GRAPH BUILDER
Leave open only subset_0_of_ENVISAT-ASA_IMP_1PNDP
A20090412_092427_000000152078_00079_37207_8080_App
Orb
150
CHAIN 2 GRAPH BUILDER
Open the Graph Builder
151
CHAIN 2 GRAPH BUILDER
152
CHAIN 2 GRAPH BUILDER

• Right click on the Graph
• Add Geometry -gt Terrain Correction

153
CHAIN 2 GRAPH BUILDER
Customize Terrain Correction ? Apply Radiometric
Normalization
154
CHAIN 2 GRAPH BUILDER
- Add Geometry -gt Ellipsoid Correction RD
155
CHAIN 2 GRAPH BUILDER
3) Add a Read
Browse for the SimTC ouput
156
CHAIN 2 GRAPH BUILDER

• Add CreateStack

157
CHAIN 2 GRAPH BUILDER

• Connect Terrain Correction to 1-Read
• Connect Ellipsoid Correction RD to 1-Read
• Connect Create Stack
• Terrain Correction
• Ellipsoid Correction RD
• SimTC Reader
• Connect Write to CreateStack
• Process

158
CHAIN 2 RGB VISUALIZATION
RD TC (Red) EC RD (Green) SimTC (Blue)
The results show EC only puts the image in the
projection of the DEM RD TC and SimTC are much
better
159
CHAIN 2 RESULTS
SimTC gives a better looking result than RD TC
Range Doppler Terrain Correction
SAR Simulation Terrain Correction
160
CHAIN 3 ASCENDING PASS
Terrain correction and Radiometric normalization
Multilooking 210
Apply orbit file
ASA_IMS_1PNDPA20090504.N1
C\NestData\Track ASCENDING
Layer stack with 1 output from CHAIN 2
Using the Graph Builder
161
CHAIN 3
Create a folder called CHAIN3 within C\NestData
162
CHAIN 3 GRAPH BUILDER
From Geometry
From SAR tools
163
CHAIN 3 GRAPH BUILDER
Select from C\NestData\Track ASCENDING
164
CHAIN 3 GRAPH BUILDER
165
CHAIN 3 GRAPH BUILDER
166
CHAIN 3 GRAPH BUILDER
167
CHAIN 3 GRAPH BUILDER
168
CHAIN 3 GRAPH BUILDER
169
CHAIN 2 AND CHAIN 3 OVERLAY
From CHAIN 2 folder open the product subset_0_of_
ENVISAT-ASA_IMP_1PNDPA20090412_...._AppOrb_SimTC.d
im
170
CHAIN 2 AND CHAIN 3 OVERLAY
Click on the LAYER MANAGER
171
CHAIN 2 AND CHAIN 3 OVERLAY

• Click on
• 2) Select Image of Band / Tie-Point Grid and
  click on Next

172
CHAIN 2 AND CHAIN 3 OVERLAY
1.select
2.Click on
173
CHAIN 2 AND CHAIN 3 OVERLAY
Play with the transparency
174
MOSAICKING

• The Mosaic Operator combines overlapping products
  into a single composite product.  
• The mosaicking is achieved based on the geocoding
  of the source products therefore the geocoding
  needs to be very accurate.
• It is recommended that the source products be
  Terrain Corrected and Radiometric Normalized
  first.

175
MOSAICKING 3 ASAR IMP SICHUAN CHINA
Without TC
With TC
176
MOSAICKING
62 ASAR GM Products Mosaic of Australia
177
BATCH PROCESSING

• From the Graph menu select Batch Processing
• 1- Press the Load button and browse for the
  Graphs/SICHUAN_chain.xml
• Add the IMP products from Sichuan_earthquake
  folder
• In ApplyOrbitFile select DORIS vor
• Multilook 5
• In Terrain Correction source Amplitude
• Press Run

2
1
178
MOSAICKING

• From the Geometry menu select Mosaicking
• Press Add and browse for the products you
  recently batched processed
• In the Mosaic tab enter the output pixel size
• Press Process

179
OCEAN TOOLS

• Ship Detection
• Oil Spill Detection
• Open Prestige dataset
• ASAR WSM
• Already Subset and Calibrated
• From the Graph Builder, create this graph

180
OCEAN TOOLS OBJECT DETECTION
Open Sigma0 band In the Layer Manager, press the
Add button () In the Add Layer dialog, select
Object Detection Results
181
OCEAN TOOLS OBJECT DETECTION
182
OCEAN TOOLS - OIL SPILL DETECTION

• Add oil spill Bitmask using the Bitmask Manager
• Checkmark the bitmask and press Apply

183
OCEAN TOOLS - OIL SPILL DETECTION
ASAR WSM Prestige oil spill - Galicia, Spain,
November 2002
Original WSM
Calibrated Subset
Gamma Map Speckle Filter
184
OCEAN TOOLS - OIL SPILL DETECTION
Land Masked
Map Projected
Detection
185
Thank You