Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

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

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [FA-1 TOPOGRAPHIC ANALYSIS]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Correction for Off-Nadir Viewing and Topographic Effects. Sunji Mural, Toshiaki Hashimoto

Document type:: Multivolume work

Structure type:: Chapter

X y 0 f•tan( 0 ) (5) Here is introduced an example of' the results. The geometric correction of thermal infrared Image of VIMR (band 3) was done with 18 GCPs and resampled into the pixel size of 20” in latitude and 30 In longitude. Photo. 2 shows the surface temperature distribution of the east part of Japan. The image is represented by color level slicing. 4. Geometric Correction of SEASAT SAR Imagery with DTM A radar imagery over mountainous areas has geometric distor tions owing to topographic effects since it is acquired at the big off-nadir angle and processed on the assumption that the ground surface is plane. Especially the distortion on the range direction is very big and cannot be ignored. The study on correction of these distortions of SEASAT SAR using elevation data has been carried out It is assumed that the earth is globe and the swath area of radar is plane as shown in Fig. 3. Topographic effects are examined on the reference plane B-C which is defined by the intersection B between the earth surface and the beginning point of swath and by the intersection C between the earth surface and the main axis of fan beam. The reference plane of uncorrected imagery is supposed to be the plane B-E which is normal to the vertical line from sensor and contains point B. The relation between corrected image coordi nate (u,v) and uncorrected one (u’,v') is expressed as below, where u and u’ is on the range direction and v and v' is on the azimuth direction. Let the origin of coordinate to be ( 0 ) in (u,v) and ( 0' ) in (u',v’), respectively. r 2 = t*+ s 2 = ( T - z ) 2 + u 2 = ( H + m ) 2 + u ' ‘ v = v ' (6) where r : slant range T : distance from sensor to plane B-C H : altitude of sensor z : ground height above plane B-C s : position on plane B-C corresponding to u’ on plane B-E m : difference between distance from sensor to plane B-E and altitude of sensor ( H ) The ground height (z) is prepared on a geographic coordinate system(x.y). The transformation functions between (u,v) and ( x,y ) is determined as polynomials by GCPs as below. u = f ( x, y ) (7) v = g ( x, y ) The several polynomials of different; order have been examined with 35 GCPs. The results indicated that the range direction (f) could be sufficiently expressed by a binomial and the azimuth direction (g) could be by a monomial with accuracy of less than one pixel. Photo. 3 shows one of the results, which covers Pasadena area 803

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fullscreen: Proceedings of the Symposium on Global and Environmental Monitoring (Part 1)

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