Ion Mass Spectrometer Data

Description

This data set, provided by the principal investigator, shows the concentration of various ion species as a function of universal time. The data set is on binary tapes written on an IBM 360/75 computer. A file contains data taken during one day. Each record contains 61, 4-byte words, and all words are in IBM internal floating point representation. Included in a record are values for the following parameters: the concentration of ion species with mass-to-charge (M/Q) values of 1, 2, 4, 7, 8, 14, 16, 18, 28, 30, and 32; the ram-to-wake ratio, the velocity, and the flux of species with M/Q values of 1, 4, 14, and 16; electron gyrofrequency; date; universal time; orbit; geodetic altitude; absolute and relative spacecraft velocity; spin rate and period; local apparent solar time; local magnetic time; geodetic latitude and longitude; invariant latitude; McIlwain's L-shell parameter; geomagnetic field intensity; geomagnetic dip angle; dip latitude; solar zenith angle; magnetic look angle; and sun angle.

The data are available on-line at:

http://nssdcftp.gsfc.nasa.gov/spacecraft_data/isis/plasma_ims/ISIS_2/BINARY/