Physics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986tdar.nasa..203l&link_type=abstract
In its The Telecommunications and Data Acquisition Report p 203-213 (SEE N86-22784 13-32)
Physics
Giacobini-Zinner Comet, International Sun Earth Explorer 3, Radio Telemetry, Deep Space Network, Radio Signals, Signal Reception
Scientific paper
Acquiring telemetry data from the International Cometary Explorer (ICE) at its encounter with the comet Giacobini-Zinner on September 11, 1985 proved to be among the more difficult challenges the DSN has met in recent years. The ICE spacecraft began its life as an Earth orbiting monitor of the Solar Wind. At the comet, ICE was nearly 50 times as distant as in its initial role, with its signal strength diminished nearly 2500 times. Collecting enough of that weak signal to provide meaningful scientific data about the comet required unique new telemetry capabilities and special handling by the DSN. This article describes the development and validation of the DSN telemetry capability for ICE from its early planning stages through the successful comet encounter.
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