271
x-direction y-direction
a wi | after
uH æ |
uj i ul La
435°C 1 35°C
uH m í
-13?C
ul ol 2 437°C
u = o "
: ; 13°C : nc
7 1 u
. 3 3 » before u u = € before
inl inb
Fig. 11 PSF-measurements in the thermal-vacuum-chamber during thermal tests
6. CONCLUSIONS
With a high precision calibration technique the characeristic parameter of the CCD-sensors as well as the geometric
calibration of a three line stereo camera can be done successfully. The results of geometric calibration show that the
requirements of the photogrammetric processing of the imagery are also fulfilled for a wide angle camera of 80? FOV.
Furthermore the knowledge of the PSF/MTF along the image strips gives an important input for image processing and
restoration. The PSF-measurements for systems inside a space simulating chamber gives certainty of the focusing and
temperature behaviour in space.
7. REFERENCES
Ackermann, F., Bodechtel, J., Lanzl, F., Meissner, D., Seige, P., 1989: MOMS-02 - ein multispektrales Stereo
Bildaufnahmesystem fiir die zweite deutsche Spacelab Mission D2. Geo-Informationssysteme (GIS), 2(3), pp. 5-11.
BrieB, K., Driescher, H., Paul, E., Schuster, R., Skrbek, W., 1992: Justage und Kalibrierung der WAOSS-Kamera. Bild &
Ton, 45(9/10), pp. 261-270.
Lanzl, F., 1986: The monocular electro-optical stereo scanner (MEOSS) satellite experiment. Int. Arch. of Photogrammetry
and Remote Sensing, Vol. 26(1), pp. 617-620.
Neukum, G. et. al., 1990: HRSC High Resolution Stereo Camera Mars 94 Mission - Consolidated Phase A Conception.
Deutsche Forschungsanstalt für Luft- und Raumfahrt, Oberpfaffenhofen.
Oertel, D., Kaiser, G., Jahn, H., Schuster, R., 1985: CCD-Sensoren in opt. MeBanordnungen-
Modulationsübertragungsfunktion von Optik und Sensor. radio fernsehen elektronik, 34(9), pp. 567-590
Oertel, D. et. al., 1991: Wide-Angle Optoelectronic Stereo Scanner - Phase B Study (WAOSS Science Objectives). Institut
für Kosmosforschung, Berlin.
Ohlhof, T., Kornus, W., Geometric Calibration of Digital Three-Line CCD Cameras. Int. Arch. of Photogrammetry and
Remote Sensing, Vol. 30(1), pp. 71-81.
Sandau,R., Bárwald, W., A three line wide-angle stereo camera for Mars 94 mission. Int. Arch. of Photogrammetry and
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IAPRS, Vol. 30, Part 5W1, ISPRS Intercommission Workshop “From Pixels to Sequences”, Zurich, March 22-24 1995
