Rotation and internal dynamics of Mars from future geodesy experiments
Abstract
The LaRa (Lander Radioscience) experiment on the lander platform of the ExoMars mission (the Humboldt Payload) on the surface of Mars is designed to obtain coherent two-way Doppler measurements from the radio link between the ExoMars lander and the Earth over at least one third of a Martian year. We have set up a design for LaRa and realized a breadboard. Complementary to LaRa, in the future network-science Mars-NEXT mission, there will be radio links between other landers at the surface of Mars and the orbiter and a radio link between the orbiter and the Earth. The Mars-NEXT mission to Mars addresses different fields of investigation, of which an important part is related to planetary rotation and interior structure as for LaRa. With the objectives to determine interior properties of Mars as well as angular momentum changes induced by CO2 sublimation/condensation process, we have simulated these Doppler measurements and developed a strategy for reaching these goals.
- Publication:
-
Journées Systèmes de Référence Spatio-temporels 2008
- Pub Date:
- September 2009
- Bibcode:
- 2009jsrs.conf..135D
- Keywords:
-
- Earth rotation;
- reference systems;
- relativity;
- time;
- ephemerides