Computer Science – Numerical Analysis
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995fmet.symp..267p&link_type=abstract
In NASA. Goddard Space Flight Center, Flight Mechanics/Estimation Theory Symposium 1995 p 267-276 (SEE N95-27763 09-13)
Computer Science
Numerical Analysis
Doppler Effect, Downlinking, Interplanetary Navigation, Radio Frequencies, Radio Navigation, Rangefinding, Space Exploration, Spacecraft Tracking, Mars Surface, Numerical Analysis, Position (Location), Position Errors, Viking Lander Spacecraft
Scientific paper
Future plans for planetary exploration currently include using multiple spacecraft to simultaneously explore one planet. This never before encountered situation places new demands on tracking systems used to support navigation. One possible solution to the problem of heavy ground resource conflicts is the use of multispacecraft coherent radio metric data, also known as, bent-pipe data. Analysis of the information content of these data types show that the information content of multi-spacecraft Doppler is dependent only on the frequency of the final downlink leg and is independent of the frequencies used on other legs. Numerical analysis shows that coherent bent-pipe data can provide significantly better capability to estimate the location of a lander on the surface of Mars than can direct lander to Earth radio metric data. However, this is complicated by difficulties in separating the effect of a lander position error from that of an orbiter position error for single passes of data.
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