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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 FTP site At this site (magsat.txt file) 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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*Select an activity
    Plot data List data Create file (file?)

* Enter start and stop dates
(enter year(1979-1980), month(01-12), day(01-31), hour(00-23), minute(00-59) as YYYYMMDDHRMN)
    Start      Stop     [Valid range: 1979-11-02-11-23 - 1980-05-06-23-13]

*Select variables

Word         Description 
   Geocentric Latitude, Deg, (-90.0 -  90.0)     
   Geocentric Longitude, Deg, ( -180.0 - 180.0)               
   Radial distance, km      
   Bx,nT, NEV                 
   By, nT, NEV      
   Bz, nT, NEV                 

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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

NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility