XXII ISPRS Congress 2012: Technical Commission VII

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Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663821976

Title:: Technical Commission VII

Scope:: 546 Seiten

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663821976

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B7)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [ADDITIONAL PAPERS]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: SAR POLARIMETRIC SIGNATURES FOR URBAN TARGETS - POLARIMETRIC SIGNATURE CALCULATION AND VISUALIZATION Professor Anjana Vyas, Ms. Bindi Sashtri

Document type:: Multivolume work

Structure type:: Chapter

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B7, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia either licensed (e.g. SARscape, ENVI), or those that are freeware (e.g. POLSARpro, RAT) do not currently help to calculate and develop the like and cross polarized signatures of various targets based on the stokes matrix. Also, the study and classification of urban targets using polarimetric microwave remote sensing data is still not very widespread as much as in case of optical data. Such a polarimetric study of urban targets, can greatly help in studying the scattering behaviour of various urban features like roads, buildings (tall & short), parks, lakes, open grounds, bridges, agriculture fields (cultivated and non cultivated), etc, thus helping in better land use classification studies using radar data. In the present work, an attempt has been made to develop a Polarimetric Signature calculation and visual representation tool named “POLSIC”, to generate both Co-polarized and Cross polarized signatures, based on the calculation of Stokes matrix and the backscattered power at various ellipticity and orientation angles. Various urban targets within a part of Ahmedabad city were chosen, followed by generation of polarimetric signatures (both co-pol and cross pol) for each target using the developed tool. These polarimetric signatures were then studied and analyzed in detail. 2. MATERIAL AND METHODS 2.1 Study Area and Data Used: For this study, a part of Ahmedabad located at 23° 01°33” N / 72° 27°48” E has been chosen. The city sits on the banks of the River Sabarmati, in north-central Gujarat. It spans an area of 205 km? (79.15 square miles). For this purpose, C band- RADARSAT-2 data (quadpol, SLC mode), acquired on 18^ December, 2009 has been used. In order to verify the targets identified in the RADARSAT- 2 data, geocoded, VIR, LISS-4 optical data (resolution: 5.8 meters) was used, with its date of acquisition being 16" November, 2004. 536 2.2 Development of *Polarimetric Signature Calculation and Visual Representation Tool (POLSIC)": At this stage of tool development, it allows a new user/researcher ,in the field of polarimetric signature study, to use the tool as a dynamic reference and study material, for viewing studying and analyzing the existing class types and their polarimetric signatures, including the stepwise calculations( for both like and cross polarization case). At the same time it could also be used to perform all calculations based on Stokes matrix, by any level of user, save the same and again use them as a reference next time. For a given set of amplitude and phase values, the tool: Calculates Stokes matrix and backscattered power for both Co-polarization and Cross polarization cases; Representation of the same in tabular form on the GUI, with dynamic generation of 3D Polarimetric signatures for both cases; The new values can be saved in the database using the “SAVE “button. User can “EDIT”, “UPDATE” and “DELETE” these values from the GUI; For Polarimetric signatures generated, functions like zoom in, zoom out, pan, rotate, data view cursor, colour bar, and legend are provided. The tool is user friendly and easy to learn. In order to develop the tool, Visual Studio 2005 has been used as a platform, and a Matlab component has been developed to generate 3D plots. The stepwise scientific calculations carried out for developing the tool include input of amplitude and phase values (defined in the GUI), from both, the database, as well as the user. The phase values are converted from degree to radians. This is followed by calculation of real and imaginary parts for the defined amplitude and phase values. Thereafter the expressions of Stokes matrix [K] (Eqn.1) are calculated. Following are the expressions calculated, by taking input from real and imaginary values obtained in the first step. 1 S11 = 5 San 1“ + ISl? rk Sun? zr IScl2) 1 $12 = = (Sha? = Saul. + ISl + IS el)

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