PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
OBJECT = TEXT
PUBLICATION_DATE = " "
NOTE = "Experiment description for the
Jovian System Ephemeris Improvement
Experiment (Delta DOR's) conducted
starting in 1996 through 1997 (DOY 199
through DOY 344). Formatted for display
or printing with up to 78 constantwidth
characters per line."
END_OBJECT = TEXT
END
Jovian System Ephemeris Improvement Experiment
The experiment objective is to improve knowledge of the ephemeris of
Jupiter. Measurements of the Galileo spacecraft angular position, in
Jupiter orbit, were made at 24 distinct epochs between July 17, 1996 and
December 10, 1997. Jupiter's position is tied to the spacecraft position
through the navigation process, so these data provide a measurement of the
Jupiter angular position. The measurement technique, known in the Deep
Space Network as Delta Differential One-way Range (Delta DOR), determines
the angular position offset between the spacecraft and an angularly nearby
quasar using differential radio interferometry. Delta DOR measurements
made on two intercontinental baselines on the DSN, spanning a fraction of
the Jupiter orbital period, are combined with existing data to solve for an
improved Jupiter ephemeris in the radio reference frame.
|