Loading...
Please wait, while we are loading the content...
Similar Documents
Separation of core and crustal magnetic field sources
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Langel, R. A. Shure, L. Parker, R. L. |
| Copyright Year | 1985 |
| Description | Fluid motions in the electrically conducting core and magnetized crustal rocks are the two major sources of the magnetic field observed on or slightly above the Earth's surface. The exact separation of these two contributions is not possible without imposing a priori assumptions about the internal source distribution. Nonetheless models like these were developed for hundreds of years Gauss' method, least squares analysis with a truncated spherical harmonic expansion was the method of choice for more than 100 years although he did not address separation of core and crustal sources, but rather internal versus external ones. Using some arbitrary criterion for appropriate truncation level, we now extrapolate downward core field models through the (approximately) insulating mantle. Unfortunately our view can change dramatically depending on the degree of truncation for describing core sources. |
| File Size | 85983 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860003416 |
| Archival Resource Key | ark:/13960/t02z63v56 |
| Language | English |
| Publisher Date | 1985-10-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Approximation Earth Crust Spline Functions Earth Core Rocks Satellite Observation Models Magnetic Materials Magnetic Fields Magsat Satellites Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
