The main science objectives for the VOYAGER interplanetary mission are as
follows:

• investigate the structure of the solar wind magnetic fields and plasma in the
  inner and outer heliosphere;

• conduct long term study of heliospheric evolution during different phases of
  the twenty-two year solar magnetic cycle and the eleven-year solar activity
  cycle;

• study the long term solar modulation and determine the elemental and isotopic
  abundances of galactic cosmic ray particles in the heliosphere;

• measure radial gradients, spectra, and nuclear abundances of the anomalous
  component of cosmic rays from acceleration at the solar wind termination
  shock;

• investigate local particle acceleration in the interplanetary medium from
  solar flare shocks and corotating interaction regions;

• study propagation of solar energetic particles in the heliosphere.
  The average magnetic field strength produced by the spacecraft at the location
  of the outboard magnetometer of the dual magnetometers system on V1 and V2 is
  about 0.1 - 0.2 nT, comparable to the most probable magnetic field strength in
  the inner heliosheath and significantly larger than the most probable magnetic
  field strength in the distant supersonic solar wind. The spacecraft magnetic
  field is a complex, time-dependent signal that must be removed from the measured
  magnetic field signal in order to derive the ambient magnetic fields of the
  solar wind and heliosheath. Corrections must also be made for spurious magnetic
  signals and noise associated with the telemetry system, ground tracking systems,
  and other factors. Extracting the signal describing the solar wind and
  heliosheath from the many sources of uncertainty is a complex and partly
  subjective process that requires understanding of the instrument and judgment
  based on experience in dealing with the ever-changing extraneous signals. We
  estimate that for the V1 MAG data the 1-sigma the uncertainty the 48 sec
  averages for each of the components of the magnetic field BR, BT, and BN is
  typically +/- 0.02 nT; the uncertainty in magnitude F1 is typically +/- 0.03 nT.
  F1, BR, BT, and BN can differ from one another and they may vary with time, but
  there is no practical way to determine these uncertainties more precisely at
  present.

    References 
    
    Behannon, K.W., M.H. Acuna, L.F. Burlaga, R.P. Lepping, N.F. Ness, and F.M. Neubauer, 
    Magnetic-Field Experiment for Voyager-1 and Voyager-2, Space Science Reviews, 21 (3), 235-257, 1977. 
  
    Burlaga, L.F., Merged interaction regions and large-scale magnetic field fluctuations during 1991 - 
    Voyager-2 observations, J. Geophys. Res., 99 (A10), 19341-19350, 1994. 
  
    Burlaga, L.F., N.F. Ness, Y.-M. Wang, and N.R. Sheeley Jr., Heliospheric magnetic field strength and 
    polarity from 1 to 81 AU during the ascending phase of solar cycle 23, J. Geophys. Res., 107 (A11), 1410, 2002. 
  
    Ness, N., K.W. Behannon, R. Lepping, and K.H. Schatten, J. Geophys. Res., , 76, 3564, 1971.
  

Spacecraft ID. Value FLT1 means Voyager 1.

Flag for coordinate system. Virtually all values are HG,
meaning Heliographic Inertial

Year of the measurement, 2 digits

Fractional day of year of the measurement (Jan 1 = 1).

The magnetic field strength, the average of higher resolution field strengths, in nT

Magnitude of vector constituted by average field components

Elevation angle of magnetic field vector

Azimuth angle of magnetic field vector

Radial component of vector magnetic field in RTN coordinates.

Transverse component of vector magnetic field in RTN coordinates

Normal component of vector magnetic field in RTN coordinates

1-sigma uncertainty in the radial component of vector magnetic field in RTN coordinates.

1-sigma uncertainty in the transverse component of vector magnetic field in RTN coordinates

1-sigma uncertainty in the normal component of vector magnetic field in RTN coordinates

X component of HGI spacecraft position vector.

Y component of HGI spacecraft position vector.

Z component of HGI spacecraft position vector.

Heliocentric radial distance of spacecraft.