Photometric processing of panoramas of the Venusian surface

Details Photometric processing of panoramas of the Venusian surface Photometric processing of panoramas of the Venusian surface

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976kosis..14..678s&link_type=abstract

Kosmicheskie Issledovaniia, vol. 14, Sept.-Oct. 1976, p. 678-686. In Russian.

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Astronomical Photometry, Optical Data Processing, Panoramic Scanning, Planetary Surfaces, Spacecraft Television, Venera Satellites, Albedo, Imaging Techniques, Terrain Analysis, Video Data

Scientific paper

The method of photometric processing for determining brightness, illumination, and contrast of elements of the surface of Venus from the photoelectric signals transmitted from the television cameras mounted on the descent vehicles of the Venera 9 and 10 spacecraft is described. Preliminary results on some panoramas obtained by both cameras, which were situated about 2000 km apart on terrains of different relief character, give close reflectivity characteristics. The reflection indicatrix was orthotropic, and albedo ranged from 0.03 to 0.12, which is characteristic of dark mountain rocks with uneven surface. Relief contrast was up to 0.5; contrast due to albedo differences was up to 0.7; contrast due to other reasons was up to 0.9. Estimates of illumination in the spectrum of a calibration radiation source give a mean level of 3000-6000 lux.

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