Brief Description:
This data set contains the 286 coefficients of the POGO (10/68) spherical
harmonics model of the Earth's main (core) magnetic field. The coefficients
are for epoch 1960.0 and extend up to degree and order 11 in the constant and
first derivative terms. In addition to all the data used in POGO (3/68), the
model is based on OGO 4 field strength data until December 1967. Altogether
32,649 data points were considered in establishing POGO (6/68). Improvements
over POGO (3/68) resulted not only from the extended data base but also from
using more accurate orbital positions for OGO 2.
Availability: On one tape, networks (NSSDC ID #MG-17A)
References:
J. C. Cain and R. A. Langel, The Geomagnetic Survey by the Polar-Orbiting
Geophysical Observatories OGO 2 and OGO 4 1965-1967, Goddard Space Flight
Center, Report X-612-68- 502, Greenbelt, Maryland, 1968.
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NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility