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NASA Space Science Data Coordinated Archive Header



Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1981-08-24 to 1981-09-03


This description was generated automatically using input from the Planetary Data System.

Data Set Overview ================= This data set includes Voyager 2 Saturn encounter magnetometer data given in Heliographic coordinates and averaged from the 60 ms instrument sample rate to a 1.92 second resampled rate. The data set consists of the following columns: 1) UT of the sample in the format yyyy-mm-ddThh:mm:ss.sssZ, 2) spacecraft clock (m65536:mod60:fds-line), 3) magnetometer id (1 = LFM, 2 = HFM), 4) Br (radial, Sun to spacecraft, B-field component), 5) Bt (azimuthal B-field component, positive in the direction of planetary orbital motion), 6) Bn (North/South B-field component, positive northward), 7) Bmag (magnitude of the averaged components), 8) avg_Bmag (average of the magnetic field magnitudes), 9) delta (latitude = arcsin(Bn/Bmag)), 10) lambda (longitude = 180. - atan(Bt/Br)), 11-13) rms vectors, 14) npts (number of points in average). All magnetic field observations are measured in nanoTesla. All of the magnetic field data are calibrated (see the instrument calibration description for more details). The reference documents for this data set are: [NESSETAL1979A], [LEPPINGETAL1981], [CONNERNEYETAL1981], [BEHANNONETAL1981]. time 1.92 Sec time of the sample (UT) in the format yyyy-mm-ddThh:mm:ss.sssZ. The full sampling rate for the instrument is .06 +/- .006 sec. m65536, (counts) s/c clock mod 65536, mod 60 and mod60 and fds line fds_line mag_id n/a magnetometer ID magnetic (nT) measured parameter equaling the field magnetic field strength (e.g. in components nanoTeslas) along a particular axis (Br, Bt, Bn) direction. Usually the three orthogonal axis components are measured by three different sensors. magnetic (nT) derived parameter which combines the 3 field vector orthogonal magnetic field component (Bmag, avg_Bmag) measurements. delta n/a delta = arcsin(Bn/Bmag) lambda n/a lambda = 180. - atan(Bt/-Br) rms_Br, Pythagorean root mean square deviation rms_Bt, and of the magnetic component averages rms_Bn npts (counts) the number of data points in the current average Ancillary Data ============== An ancillary data file containing the derived spacecraft magnetic field is provided with this data at a 48 second sample rate. These data provide zero level offsets used in the data processing. S/C field data is provided in spacecraft coordinates as follows: PARAMETER RESOLUTION DESCRIPTION NAME (UNITS) time 48 sec time in format yyyy-mm-ddThh:mm:ss.sssZ m65536 n/a s/c clock mod 65536 mod60 n/a s/c clock mod60 mag_id n/a magnetometer ID Bx (nT) spacecraft coords. X component By (nT) spacecraft coords. Y component Bz (nT) spacecraft coords. Z component Bmag (nT) total magnetic field strength rms_Bx (nT) rms mag component rms_By (nT) rms mag component rms_Bz (nT) rms mag component npts (counts) number of points in average

These data are available on-line from the Planetary Data System (PDS) at:

Alternate Names



  • Planetary Science: Fields and Particles

Additional Information



Questions and comments about this data collection can be directed to: Dr. Edwin V. Bell, II



NameRoleOriginal AffiliationE-mail
Dr. Norman F. NessData ProviderUniversity of Delaware
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