Detail Data (80 ms) and 1.28 s Averaged Vector Data

Description

These binary tapes were written by an IBM 360/91 computer. Each block of 11,076 bytes is a logical record, sequentially consisting of 60 entries of year, day, milliseconds, data quality flag, bit rate flag, pseudo-sequence count, and housekeeping. Not all the 60 allotted half words (or full words) are actually used for the entries, but only as many as there are 1.28 s time intervals for which good data exist in a total duration of 1.28 min (=1.28 s x 60). These entries are then followed by sequential entries of 60 (or fewer) 1.28 s averaged values of magnetic field magnitude, orientation angles theta and phi of the field vector, and standard deviation of the field magnitude. Two hundred and forty full words are assigned for each of these items, though only a fraction of them contain germane entries. These averages are obtained, in turn, from 16 samples of Bx, By, and Bz monitored every 80 ms. These high-resolution data are also written near the end of the block, in three groups, each of which is assigned 960 full words. Spacecraft position is entered as X, Y, Z values in the GSE system as well as R (range), Y, Z in the GSM system.