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Thermospheric studies with mars global surveyor
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Chin, D. S. Lemoine, F. G. Forbes, J. M. Bruinsma, S. |
| Copyright Year | 2006 |
| Description | The Mars Global Surveyor spacecraft has been located in a near-circular, polar, and low-altitude mapping orbit about Mars for six years, since February 1999. The spacecraft is tracked routinely by the antennae of the Deep Space Network (DSN), using the X Band radio system of the spacecraft. These tracking data have been used for routine spacecraft navigation, and for radio science studies, such as the estimation of the static and time-varying gravity field of Mars. In this paper we describe the methodology for reduction of these data in order to estimate the Mars atmospheric density (normalized to an altitude 380 km) over half a solar cycle, where we discern the correlation of the density with the incident solar flux, and the 27-day solar rotation. The results show that the density at the MGS altitude varies from a mean of 0.7 x 10(exp -17) grams/cu cm near aphelion to a mean of 3.0 x 10(exp -17)grams/cu cm near perihelion. |
| File Size | 1217212 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20070016687 |
| Archival Resource Key | ark:/13960/t78s9px98 |
| Language | English |
| Publisher Date | 2006-08-24 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Deep Space Network Thermosphere Atmospheric Composition Perihelions Variations Gravitational Fields Trace Elements Mars Atmosphere Space Navigation Mars Global Surveyor Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
