0.5-Sec Averages of Magnetic Field Magnitude Sampled Every 10 Sec

Description

This data set, supplied by the principal investigator, consists of 0.5-s averages of the geomagnetic field magnitude every 10 s. No ephemeris information is included. The data are contained on a binary magnetic tape produced on an IBM 7094 computer. The data are in one file of variable-length records. The data are time ordered, and time is expressed in Julian day and milliseconds of Julian day. A Fortran IV program is available at NSSDC to compute the difference between the observed field and either the geomagnetic field model that uses the POGO 10/68 coefficients or the model that uses the GSFC 12/66 coefficients. Ephemeris information is not included in the data set. The coefficients and the ephemeris tape required for this program are available at NSSDC.