Preliminary results from the viking orbiter imaging experiment

Area of Science:

• Planetary Science
• Geology
• Atmospheric Science

Background:

• The Viking orbiter provided early high-resolution imagery of the Martian surface.
• Previous observations from Mariner 9 established a baseline for surface changes.

Purpose of the Study:

• To analyze photographic frames from the Viking orbiter's initial 30 orbits.
• To enhance understanding of Martian surface processes and features.

Main Methods:

• Acquisition and analysis of approximately 1000 photographic frames from the Viking orbiter.
• Examination of surface features in Chryse Planitia, Cydonia, and near Capri Chasma.
• Assessment of image resolutions ranging from 100 meters to over 1 kilometer.

Main Results:

• Detailed understanding of Martian surface processes including cratering, fluvial activity, and mass-wasting.
• Identification of old surfaces, abundant channel features, and permafrost indicators.
• Evidence of fluid ejecta patterns around craters and minimal changes since Mariner 9 observations.
• Observation of atmospheric phenomena such as hazes, discrete clouds, and wave clouds.

Conclusions:

• Viking orbiter data significantly advanced the understanding of Mars' geological and atmospheric processes.
• The Martian surface exhibits ancient features, hydrological indicators, and signs of permafrost.
• Atmospheric observations contribute to the study of Mars' climate.