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ARCAD MAGNETOMETER TRAC EXPERIMENT

This home page provides access to data set contains TRAC-produced full magnetic field field vectors at 2.5-sec resolution (ZAP4 memory mode only), in a spacecraft-based coordinate system (Z along s/c symmetry axis, near-radial from Earth; X near direction of spacecraft motion). It also contains the non-TRAC 8-bit data and the once-every-43-sec TRAC-produced 12-bit data. In addition it contains components of the IGRF/1980 field in a coordinate system fixed by the true radial to the Earth's center and the direction of spacecraft motion (the orbital system), and a difference vector (TRAC- produced field minus the IGRF model field) as transformed to an IGRF/1980-based geomagnetic coordinate system. This ASCII data set also contains needed spacecraft position data.

The data set (originally generated at IKI/Russia, PI Y.I.Galperin) is placed at anonymous FTP site At this site a user can find a description of data and experiment .

Time span of data set: 81-10-01 - 82-03-01
Time span for every file is given in "magnet.tab" file.

Please enter your selections and then click on the Submit button.

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* Enter year,month,day,hour (YYMMDDHH) according time given in table for one file only "magnet.tab" :
   Start time    Stop time

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 DBXGM, X-component of the Disturbance Magnetic Field in the Geomagnetic Frame, nT (From  the TRAC)
 DBYGM, Y-component of the Disturbance Magnetic Field in the Geomagnetic Frame, nT (From  the TRAC) 
 DBZGM, Z-component of the Disturbance Magnetic Field in the Geomagnetic Frame, nT (From  the TRAC)
 BXSAT-Time, and Values of Zeroing Points (Digitalization, Full Field) X-axis, Satellite Frame, nT (From  the TRAC)
 BYSAT-Time, and Values of Zeroing Points (Digitalization, Full Field) Y-axis, Satellite Frame, nT (From  the TRAC)
 BZSAT-Time, and Values of Zeroing Points (Digitalization, Full Field) Z-axis, Satellite Frame, nT (From  the TRAC)
 X- Noise Code (0,1,2,3) for theDBXGM component                
 Y- Noise Code (0,1,2,3) for theDBYGM component                
 Z- Noise Code (0,1,2,3) for theDBZGM component
 BXSATF Full magnetic Field Component in the Satellite Frame, nT (From  the TRAC)
 BYSATF Full magnetic Field Component in the Satellite Frame, nT (From  the TRAC)
 BZSATF Full magnetic Field Component in the Satellite Frame, nT (From  the TRAC)
 MAGNX Full magnetic Field Component in the Satellite Frame, nT, (Raw data from the Magnetometer)     
 MAGNY Full magnetic Field Component in the Satellite Frame, nT, (Raw data from the Magnetometer)
 MAGNZ Full magnetic Field Component in the Satellite Frame, nT, (Raw data from the Magnetometer)
 BXIGRF - IGRF80 Model Magnetic Field Along the X-axis of the Orbital Frame, nT
 BYIGRF - IGRF80 Model Magnetic Field Along the Y-axis of the Orbital Frame,nT
 BZIGRF - IGRF80 Model Magnetic Field Along the Z-axis of the Orbital Frame, nT
 BMODIGRF - a quality control. nT (Difference Between the Module of the Measured 
    Field and that of the IGRF80 Model Field
 Altitude,km
 Geographic Latitude of the Spacecraft, Degrees, +/-90
 Geographic Longitude of the Spacecraft, Degrees, 0-360
 L, McIlwain's Invariant Magnetic Drift Shell  Parameter, Earth's Radii 
 L0, Invariant Latitude, Degrees, +/-90
 MLT, Magnetic Local Time Hours.decimal hours (for centered dipole field)
 BMAG, Module of IGRF80 Magnetic Field, milliGauss
 ZSUN, Solar Zenith Angle, Degrees, 0-180


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