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Solving Cassini's Data Glitch Problem during Coherency Mode Transition for Titan Radar Observations

By P. S. Callahan, D. F. Doody, L. Y. Cheng, Yanhua Z. Anderson, D. A. Seal, K. R. Weld, V. Scarffe, H. D. Morgan, III W. M. Heventhal and T. L. Ray


We describe the problem of regular small telemetry losses incurred during coherency mode transitions in Cassini's telecommunication. The project did not originally plan any corrective steps for avoiding these data losses, because of 1) the disparity between the small durations of the transitions (1-2 min) and large playback capability losses (15 min) needed for bracketing the transition time spans and 2) the unpredictable content of data downlinking during the transitions. However, as the intense science data return from the tour began, it became apparent that the impact of these small losses can sometimes be significant. We provide two examples of the impact on Radar-dedicated Titan flybys

Topics: Communications and Radar
Year: 2006
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