This home page provides listing and plotting of 0.5-sec. resolution magnetic field vectors from NASA's MAGSAT spacecraft (300-600 km altitude, 90 deg inclination) taken between November 2, 1979 and May 6,1980. These ASCII format data are placed at SPDF's anonymous FTP site nssdc.gsfc.nasa.gov in directory spacecraft_data/magsat/ At this directory a user can find the detailed descriptions of the experiment, data processing, format, etc.,
NoteThe geomagnetic field data are given as Cartesian components in a NEV (North, East, Vertical) geocentric spherical coordinate system. In this system, the V component is positive directly towards the Earth's center. The N and E components are positive northward and eastward. The N and V components are defined relative to geocentric circles, and not relative to geodetic ellipsoids relative to which ground- observatory-measured geomagnetic BX, BY, and BZ are defined. Use of `BX,BY BZ' in this documentation refer to BN, BE, BV, and not to the (BX,BY,BZ) defined relative to an ellipsoid. Spacecraft position data are also given relative to a geocentric spherical system rather than to ellipsoidal coordinates.
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If you have any questions/comments about the OMNWeb Plus, contact
Dr. Natalia Papitashvili,Mail Code 672,
NASA/Goddard Space Flight Center, Greenbelt, MD 20771|