Poster Open Access

The Martian crustal magnetic field as seen from MG and MAVEN

B. Langlais; E. Thébault

The magnetic figure of Mars was essentially constrained by the high quality measurements of Mars Global Surveyor (1996-2006). While the orbital parameters of this mission returned repetitive measurements on the night side (2:00 am) at a nearly constant altitude of 400km, the low altitude measurements were very sparse.

The MAVEN mission (since 2014) is on an elliptical orbit around Mars, which provides a wealth of measurements at different local times and altitudes. With now almost three years of available measurements, it is possible to combine MAVEN and MGS observations and to compute a high resolution model of the martian magnetic field.

This new model supersedes previously published models. It is based on Equivalent Source Dipoles (ESD), a discrete approach which benefits from the varying data distribution. It is converted into a spherical harmonics (SH) model which is stable up to degree 137, and can be used to predict the magnetic field at the surface of Mars with an unprecedented accuracy.

Files (1.3 MB)
Name Size
AGU2017_poster3.pdf
md5:f4fd7d506aac95383d0ff8e7f0417b44
1.3 MB Download
8
2
views
downloads
All versions This version
Views 88
Downloads 22
Data volume 2.6 MB2.6 MB
Unique views 88
Unique downloads 22

Share

Cite as