PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 1993-02-01 NOTE = "This file describes the contents of this directory." END_OBJECT = TEXT END This directory contains the MAG 1.92, 9.6, and 48.0 second averaged magnetic field data in heliographic (RTN) and Kronographic (L1) coordinates, from the Voyager 2 Saturn encounter period of 1981-08-23 to 1981-09-03. The L1 coordinates is a Saturn centered spherical system, based on the Saturn Longitude System (Voyager Measurements of the Rotation Period of Saturn's Magnetic Field, Desch and Kaiser, JGR, 8, 253, 1981). Those data have been averaged from the 60 ms instrument sample rate data. The estimated magnetometer offset data in spacecraft coordinates are also provided. The data in this directory are provided in ASCII tables. Detailed data file information is described as below: --------------------------------------------------------------------------- File Name Data Coverage File Contents --------------------------------------------------------------------------- HG_1_92S.TAB 1981-08-24 to 1981-09-03 1.92 second res. data in RTN HG_9_6S.TAB 1981-08-24 to 1981-09-03 9.6 second res. data in RTN HG_48S.TAB 1981-08-24 to 1981-09-02 48.0 second res. data in RTN L1_1_92S.TAB 1981-08-23 to 1981-08-29 1.92 second res. data in L1 L1_9_6S.TAB 1981-08-23 to 1981-08-29 9.6 second res. data in L1 L1_48S.TAB 1981-08-23 to 1981-08-29 48.0 second res. data in L1 SC_FIELD.TAB 1981-08-23 to 1981-09-02 48.0 second res. data in S/C Additional information associated with this data set is available in the following files: file contents /CATALOG/MAGINST.CAT MAG instrument description /CATALOG/VG2_MHG192DS.CAT data set description for 1.92 sec data in RTN /CATALOG/VG2_MHG96DS.CAT data set description for 9.6 sec data in RTN /CATALOG/VG2_MHG48DS.CAT data set description for 48 sec data in RTN /CATALOG/VG2_ML1192DS.CAT data set description for 1.92 sec data in L1 /CATALOG/VG2_ML196DS.CAT data set description for 9.6 sec data in L1 /CATALOG/VG2_ML148DS.CAT data set description for 48 sec data in L1 /CATALOG/PERSON.CAT personnel information /CATALOG/REF.CAT key reference description /DOCUMENT/MAG/MAGINST.ASC ASCII and HTML versions of the MAG investigation and MAGINST.HTM description paper [BEHANNONETAL1977] /-------------------------\ | 1.92 SECOND HG DATA | \-------------------------/ ======================================================================== name type description ------------------------------------------------------------------------ time float_8 in seconds elapsed since Jan 1, 1966 00:00:00.000Z m65536 integer_4 s/c clock mod 65536 mod60 integer_4 s/c clock mod 60 fds_line integer_4 s/c clock fds line mag_id integer_4 magnetometer id Br float_4 radial component Bt float_4 tangential component Bn float_4 normal component Bmag float_4 total mag avg_Bmag float_4 average total mag delta float_4 arcsin(Bn/Bmag) = delta lambda float_4 180. - ATAN(Bt,-Br) = Lambda rms_br float_4 rms 1 rms_bt float_4 rms 2 rms_bn float_4 rms 3 npts integer_4 data points in average dflag char_8 dataflag /-------------------------\ | 9.6 SECOND HG DATA | \-------------------------/ ======================================================================== name type description ------------------------------------------------------------------------ time float_8 in seconds elapsed since Jan 1, 1966 00:00:00.000Z m65536 integer_4 s/c clock mod 65536 mod60 integer_4 s/c clock mod 60 fds_line integer_4 s/c clock fds line mag_id integer_4 magnetometer id Br float_4 radial component Bt float_4 tangential component Bn float_4 normal component Bmag float_4 total mag avg_Bmag float_4 average total mag delta float_4 arcsin(Bn/Bmag) = delta lambda float_4 180. - ATAN(Bt,-Br) = Lambda rms_br float_4 rms 1 rms_bt float_4 rms 2 rms_bn float_4 rms 3 npts integer_4 data points in average dflag char_8 dataflag /-------------------------\ | 48 SECOND HG DATA | \-------------------------/ ===================================================== name type description ----------------------------------------------------- time A24 time in the format yyyy-mm-ddThh:mm:ss.sssZ m65536 I5 s/c clock mod 65536 mod60 I2 s/c clock mod 60 fds_line I1 s/c clock fds line mag_id I1 magnetometer id Br 1PE15.8 radial component Bt 1PE15.8 tangential component Bn 1PE15.8 normal component Bmag 1PE15.8 total mag avg_Bmag 1PE15.8 average total mag delta 1PE15.8 arcsin(Bn/Bmag) = delta lambda 1PE15.8 180. - ATAN(Bt,-Br) = Lambda rms_br 1PE15.8 rms 1 rms_bt 1PE15.8 rms 2 rms_bn 1PE15.8 rms 3 npts I1 data points in average dflag A8 dataflag /-------------------------\ | 1.92 SECOND L1 DATA | \-------------------------/ ===================================================== name format description ----------------------------------------------------- time A24 Spacecraft event time (UTC) at center of average. sclock 1X,A12 s/c clock counter mag_id 1X,I2 magnetometer id Br 1X,F8.3 radial component Btheta 1X,F8.3 azimuthal component Bphi 1X,F8.3 normal component Bmag 1X,F8.3 total mag avg_Bmag 1X,F8.3 average total mag delta 1X,F8.3 arcsin(Bz/Bmag) = delta lambda 1X,F8.3 180. - ATAN(By,-Bx) = Lambda rms_b1 1X,F6.4 rms 1 rms_b2 1X,F6.4 rms 2 rms_b3 1X,F6.4 rms 3 npts 1X,I3 data points in average /-------------------------\ | 9.6 SECOND L1 DATA | \-------------------------/ ====================================================================== name type description ---------------------------------------------------------------------- time char_24 time in the format yyyy-mm-ddThh:mm:ss.sssZ ctime float_8 seconds since 1966-01-01 00:00:00.000 m65536 integer_4 s/c clock mod 65536 mod60 integer_4 s/c clock mod 60 fds_line integer_4 s/c clock fds line mag_id integer_4 magnetometer ID Br float_4 radial (Jupiter to spacecraft) B-field component Btheta float_4 North/South (system III) B-field component, positive southward Bphi float_4 azimuthal (system III) B-field component, positive eastward Bmag float_4 magnitude of the averaged magnetic field components avg_Bmag float_4 average of the magnetic field magnitudes delta float_4 delta = arcsin(Btheta/Bmag) lambda float_4 lambda = 180. - atan(Bphi/-Br) rms_Br float_4 rms Br rms_Bt float_4 rms Bt rms_Bn float_4 rms Bp npts integer_4 number of data points in average dflag char_8 data flag /-------------------------\ | 48 SECOND L1 DATA | \-------------------------/ ===================================================== name type description ----------------------------------------------------- time A24 time in the format yyyy-mm-ddThh:mm:ss.sssZ m65536 I5 s/c clock mod 65536 mod60 I2 s/c clock mod 60 fds_line I1 s/c clock fds line mag_id I1 magnetometer id Br 1PE15.8 radial component Btheta 1PE15.8 azimuthal component Bphi 1PE15.8 normal component Bmag 1PE15.8 total mag avg_Bmag 1PE15.8 average total mag delta 1PE15.8 arcsin(Bz/Bmag) = delta lambda 1PE15.8 180. - ATAN(By,-Bx) = Lambda rms_br 1PE15.8 rms Br rms_bt 1PE15.8 rms Bt rms_bp 1PE15.8 rms Bp npts I1 data points in average dflag A8 data flag value /-------------------------\ | SC_FIELD DATA | \-------------------------/ ==================================================================== name type description -------------------------------------------------------------------- time A24 time in the format yyyy-dd-mmThh:mm:ss.sssZ m65536 I5 s/c clock mod 65536 mod60 I2 s/c clock mod 60 mag_id I1 magnetometer id Bx 1PE15.8 s/c mag component By 1PE15.8 s/c mag component Bz 1PE15.8 s/c mag component Bmag 1PE15.8 total mag rms_bx 1PE15.8 rms mag component rms_by 1PE15.8 rms mag component rms_bz 1PE15.8 rms mag component npts I3 data points in average