i" 
a 
E 
Presented Papers 
Author: Mr. R. Bernstein (U.S.A.) 
Title: Systems for Earth Observation Sen- 
sor Data Processing 
The IBM approach to processing digital data 
from earth observational satellites was reviewed 
in a paper by Mr. Bernstein and presented by 
Mr. D. Ferneyhough (U.S.A.) The system allows 
application of radiometric and geometric correc- 
tions, permits multistage registration and can 
utilize geodetic ground control points. 
Author: Mr. H. Báhr (F.R.G.) 
Title: Geometrical Models for Satellite 
Scanner Imagery PP ////12 
An additional paper on geometric transformation 
of scanned imagery was given by Mr. Báhr. 
Authors: Dr. J. Trinder (Australia) 
Dr. S. Nasca (Australia) 
Title: Test on the Mapping Application of 
Landsat Imagery PP 111/60 
Tests had been made on the application of Landsat 
images to 1:250000 mapping within Australia, 
using identifiable points on existing maps as 
control. Polynomial and affine formulae had been 
used to test the accuracy of transformation of 
image coordinates onto ground coordinates de- 
rived from available maps at scales of 1:250000 
and 1:100000. The accuracies of the coordinates 
after both transformations approached the local 
map accuracy standards. 
Based on parameters derived from affine trans- 
formations of each quadrant of an image, rectified 
enlargements had been prepared at a scale of 
1:250000. It appeared that the accuracy of such 
enlargements would satisfy the map accuracy 
standards for 1:250000 maps. 
As Dr. Trinder does not go back to the digital 
magnetic tape recordings of the data, but uses 
photos produced from this data, his work cor- 
responds to that of Mr. M. Ali (Canada) presented 
at the third session. 
Authors: Dr. J. Anderson (U.S.A) 
Dr. M. Nasu (U.S.A)) 
Title: A Multiseries Digital Mapping Sys- 
tem for MSS and Photographic Re- 
motely Sensed Data PP 11/07 
The objective of this investigation was to study 
the feasibility of a comprehensive procedure for 
positioning multiseries remote sensing digital 
data to be used in conjunction with a qualitative 
analysis of spectral characteristics of the infor- 
mation. A multistage geometric control system 
has been developed and studied using similated 
and real multistage, multidate, and multisensor 
remote sensing data. This system can be used 
for direct, sequential, or simultaneous solution 
of the multiseries data. Results with simulated 
data indicate that the combination of photo- 
graphic and scanner data in a simultaneous 
adjustment yields positional accuracy improved 
by approximately twenty per cent compared 
with the direct (scanner data only) and sequential 
(scanner and photographic data) solutions. Re- 
sults of tests with real data indicate that from a 
theoretical viewpoint, the simultaneous mul- 
tistage adjustment yieds a reduction of relative 
discrepancies when compared to direct and 
sequential solution, while in a practical sense 
the sequential and simultaneous adjustments 
are comparable. 
Author: Dr. G. Otepka (Austria) 
Title: Practical Experience in the Rectifi- 
cation of MSS-Images PP 111/43 
The MSS—image, produced on the basis of 
digitally scanned data, is placed in one picture 
carried of a stereo-comparator and a line map 
or orthophoto of the same terrain (a "rectifica- 
tion master") is placed in the other picture carrier. 
The distortion can now be measured in a number 
of discrete points and a rectangular reference 
grid can be interpolated, for example by linear 
prediction. The data so obtained are written out 
on magnetic tape and serve as the input data 
to drive the Wild Avioplan OR 1. 
The paper "Rectification of Multispectral Scanner 
Imagery" by Dr. K. Kraus (Austria) was attached 
as an Appendix to Dr. Otepka's paper. 
Tuesday, July 20, 1976, from 15.45 to 17.15 
Session 8 of Commission Ill 
Topic: Remote Sensing (2): Radar Imagery 
Restitution 
Chairman: Dr. E. Mikhail (U.S.A.) 
The following Presented Paper dealing with the 
topic of the session had been handed in, but 
there was not enough time for its full presenta- 
tion. 
Authors: Dr. F. Leber! (U.S.A.) 
; Dr. H. Jensen (U.S.A.) 
Dr. J. Kaplan (U.S.A.) 
Title: Side-Looking Radar Mosaicking Ex- 
periment PP 111/35 
A block of 24 overlapping synthetic aperture 
side-looking radar images flown over a well- 
mapped area of about 90000 km? provided an 
opportunity to evaluate the mapping accuracy 
achieved in current radar mosaicking projects. 
The maps at scale 1:24000 that are available in 
the imaged area permit the study of the geo- 
metric errors of the radar mosaics and of indi- 
vidual radar strips. The paper shows that a suc- 
cessful radar mosaicking process requires the 
elimination of image errors of up to several ki- 
lometers. These errors are introduced as a result 
of the limited precision of the inertial aircraft 
navigation. The paper presents an example of a 
radar mapping effort, in which the navigation 
errors could be eliminated. The resulting radar 
mosaics have residual RMS mapping errors of 
planimetry of about + 150 m. 
The first paper of the session was presented by 
Dr. F. Leberl from the United States. 
Invited Paper 
Author: Dr. F. Leberl (U.S.A.) 
Title: Imaging Radar Applications for 
Mapping and Charting /P ////06 
This paper was a complete review of radar sys- 
tems applications and capabilities. 
In the general discussion Dr. A. Fontanel (France) 
asked whether the Seasat radar could be switched 
105