OGO Search Coil Magnetometer Experiments

The OGO triaxial search coil magnetometer measures naturally occurring magnetic fluctuations between 0.01 Hz and ~1000 Hz in the space around the earth. The instrument design is described and the design rationale discussed. The results of the observations on the first five OGO spacecraft in the magnetosphere, magnetotail, magnetosheath, and interplanetary medium, as well as at hydromagnetic bow shock, are summarized and discussed.