Brief Description:
This data set contains the 195 coefficients of the MGST (6/80) spherical
harmonics model of the Earth's main (core) magnetic field. The coefficients are
for epoch 1979.85 and extend to degree and order 13. No secular variation terms
are included. This model was one of the first published results of the MAGSAT
satellite mission. It is based on initial vector measurements for the
magnetically quiet days of November 5-6, 1979. The authors included also
statistically significant external terms of degree and order 1 describing the
effect of external field sources.
Availability: (1) from NSSDC's Request Office on diskette for use on PCs; (2) retrievable from NSSDC's anonymous FTP site.
NSSDC ID: MG-1BA
References:
R. A. Langel, Initial Geomagnetic Field Model from MAGSAT, NASA TM-80679,
Washington, D.C., 1980.
R. A. Langel, R. H. Estes, G. D. Mead, E. B. Fabiano, and E. R. Lancaster, Initial Geomagnetic Field Model from MAGSAT Vector Data, Geophys. Res. Lett. 7, 793, 1980.
| If you have questions/comments about the various models available from NSSDC, contact:Dr. Dieter K. Bilitza. If you have any questions/comments about magnetic field models and Web access to run models, contact: Dr. Natalia Papitashvili, National Space Science Data Center, Mail Code 630, NASA/Goddard Space Flight Center, Greenbelt, MD 20771 |
NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility