Local Gravity Fields From Mars Express Residual Doppler Data

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

5417 Gravitational Fields (1227), 6225 Mars, 1219 Local Gravity Anomalies And Crustal Structure, 1227 Planetary Geodesy And Gravity (5420, 5714, 6019)

Scientific paper

Planetary gravity fields can be studied in detail by measuring their effect on the velocity of an orbiting probe. Two main methods of analysis of the resulting Doppler data are available. Either a complete dynamical modeling of the probe orbit yields a global spherical harmonic gravity field, or a local analysis of the residual Doppler data leads to a model of the gravity field in a given area. The very elliptical orbit of Mars Express favors the second method, since only measurements near pericenter include a significant contribution from underlying gravity anomalies. The residual line-of-sight Doppler data provided by the MaRS experiment are inverted with a Tarantola-Valette stochastic procedure, with a priori knowledge of the solution given by a full correlation matrix constrained by the Kaula rule. As a result, the Doppler data are mapped as gravity disturbances on a sphere close to the planetary surface. Mars Express gravity data are expected to be especially useful for the study of polar caps, where the gravity field is not well known at the present.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Local Gravity Fields From Mars Express Residual Doppler Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Local Gravity Fields From Mars Express Residual Doppler Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local Gravity Fields From Mars Express Residual Doppler Data will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1646531

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.