Introduction

Two types of images are available. The first is an 8-hour line plot of magnetometer parameters in the GSM coordinate system. The second is a 14-hour line plot in the VDH coordinate system.

MAG01: 8-hr GSM plots

The plots give an day-by-day overview (in 1/3 segments) of magnetic field records acquired by the AMPTE CCE spacecraft. The input data for the plots are the standard pool data which have been processed by the AMPTE Science Data Center. The pool data files contain 68-sec averages of the magnetic field in the GSE coordinates. The plotted quantities are from top to bottom:

MAG02: 14-hr VDH plots

The plots give an orbit-by-orbit overview of magnetic field records acquired by the AMPTE CCE spacecraft. The input data for the plots are the standard pool data which have been processed by the AMPTE Science Data Center. The pool data files contain 68-sec averages of the magnetic field in the GSE coordinates. To produce the plots the coordinates were rotated into the dipole VDH system in which H is antiparallel to the dipole moment of the Earth's internal field, D (eastward) is perpendicular to the H axis and the satellite position vector with respect to the center of the Earth, and V (outward) completes a right-handed V-D-H system. The dipole is assumed to be located at the center of the Earth with its north pole located in geographic coordinates at 78.8 deg latitude and 289.24 deg longitude.

Each plot is centered at the time of CCE's apogee with an accuracy of 10-min. The time span of the plots is 14 hours, which is slightly shorter than the orbital period of 15.6 hour. Little information is lost, because near the edges of the 15.6-hr span the magnetic field has a large magnitude, making it difficult to extract temporal field variations in the linear-scale display. The plotted quantities are from top to bottom: