Analysis and prediction of Doppler noise during solar conjunctions

Details Analysis and prediction of Doppler noise during solar conjunctions Analysis and prediction of Doppler noise during solar conjunctions

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975dsnpr..30..231b&link_type=abstract

In its The Deep Space Network p 231-263 (SEE N76-15190 06-12)

Physics

Conjunction, Doppler Effect, Electromagnetic Noise, Sun, Helios 1, Mathematical Models, Pioneer 10 Space Probe, Pioneer 11 Space Probe

Scientific paper

The results of a study of Doppler data noise during solar conjunctions were presented. During the first half of 1975, a sizeable data base of Doppler data noise (estimates) for the Pioneer 10, Pioneer 11, and Helios 1 solar conjunctions was accumulated. To analyze this data, certain physical assumptions are made, leading to the development of a geometric parameter ("ISI") which correlates strongly with Doppler data noise under varying sun-earth-spacecraft geometries. Doppler noise models are then constructed from this parameter, resulting in the newfound ability to predict Doppler data noise during solar conjunctions, and hence to additionally be in a position to validate Doppler data acquired during solar conjunctions.

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