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Title
Proceedings of the Symposium on Progress in Data Processing and Analysis

3. Investigated Space images
Since launch of Landsat Thematic Mapper (TM) in 1982 space images usable for
mapping purposes are available. The Thematic Mapper scanner was not projected for
cartographic use. But images of neighboured orbits are overlapping 7% at the
equator and 84% at a (attitude of 80°. So the ground points are visible from
different projection centers and a three dimensional determination is possible.
The Metric Camera (MC) was a West German experiment in 1983. A normal angle
camera Zeiss RMK 30/23 from standard production was carried into space in the
Spacetab with the Space Shuttle. The camera was not equiped with forward motion
compensation and the flight was carried out in December under very low sun angle.
Caused by this, the photo resolution has been poor. Kodak Aerochrome and the
panchromatic Kodak Double X film has been used.
In 1984 the NASA has made a similar experiment with the Large Format Camera.
The large format has been used in flight direction for the improvement of the base
to height ratio. A forward motion compensation has improved the photo resolution.
Opposite to the previous mentioned experiments, since 1984 the soviet KFA 1000 is
an operational system. The photos are distributed by Sojuzkarta. Also the KATE
200 and the KATE 140 are operational like the MKF6.
The SPOT satellite has been projected for cartographic applications. The digital
images are available since the launch in 1986 and in addition from the SPOT2 since
1990. The very narrow view angle of 4.1° can be inclined up to 27° to both sides
of the orbit. So the same area can be imaged from different orbit with a base to
height ratio up to 1.0.
MC
LFC
KATE
KFA
TM
SPOT
focal length [mm]
305
305
200
1000
_
(2087)
film format [mm]
230*230
460*230
180*180
300*300
(150*150)
(150*150)
flying height [km]
250
225-352
280
280
705
840
scale number
820 000
740 000-
1 150 000
1400 000
275 000
(1200000)
(400000)
covered area [km]
188*188
170*340
-260*530
250*250
80*80
180*180
60* (60)
ground resolution
16-33
10-25
25-40
5-10
[m/lp]
pixel on ground [m]
30
10/20
height to base
3.3 : 1
1.6 : 1
2.8 : 1
8 : 1
4.2 : 1 ; 0°
24 : 1; 80°
=¡1:1
table 2: technical data of used sensors
128