In message .com,
writes
http://www.nrao.edu/pr/2005/titanwinds/

February 9, 2005

Contact:

Dave Finley, Public Information Officer
Socorro, NM
(505) 835-7302


Radio Telescopes "Save the Day," Produce Data on Titan's Winds

In addition to measuring the motion-generated frequency shift of
Huygens' radio signal, radio telescopes also were used to make
extremely
precise measurements of the probe's position (to within three-quarters
of a mile, or one kilometer) during its descent. This experiment used
the VLBA antennas, along with others employing the technique of Very
Long Baseline Interferometry (VLBI).

Probably a dumb question, but is that done by triangulation on the
transmitter?
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