A large magnetosphere magnetic field database compiled from the measur
ements of 11 Earth-orbiting spacecraft during 1966-1986 is described.
The 11 contributing spacecraft (Explorer 33 and 35, IMP 4, 5, 6, 7 and
8, Heos 1 and 2, and ISEE 1 and 2) provide data between 4R(E) and 60R
(E), Which have been edited in order to exclude data outside the magne
tosphere. Currently, the database totals more than 79,000 records, whi
ch sum to a total of more than 1600 spacecraft days in the magnetosphe
re. Each of these records contains the average total field vector in g
eocentric solar magnetospheric coordinates, disturbance field vector (
measured field minus Earth's internal field), time information, spacec
raft position, AE, AL, Kp. and Dst geomagnetic indices, and associated
solar wind and interplanetary magnetic field parameters when availabl
e. These data have constituted and will undoubtedly continue to consti
tute the standard database for magnetospheric modeling studies. They a
re also appropriate for statistical studies of the magnetic field and
its dependence on solar wind quantities. Plans are to update this data
base in the future with data from additional spacecraft.