PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2004-01-12 NOTE = "This file describes the Magnetometer data available on this DVD-R volume." END_OBJECT = TEXT END This directory contains the Voyager 1 MAG 1.92, 9.6, and 48.0 second averaged magnetic field data in heliographic (RTN) and Jovigraphic System III (SYS3) coordinates, from the Jupiter encounter period (1979-02-26 to 1979-03-24). The estimated spacecraft field in payload coordinates is also provided. The data are provided in fixed-width, comma delimited ASCII tables. Detailed data file information is described as below: --------------------------------------------------------------------------- File Name Data Coverage File Contents --------------------------------------------------------------------------- HG_1_92S_A.TAB 1979-02-26 to 1979-03-02 1.92 sec. data in RTN HG_1_92S_B.TAB 1979-03-03 to 1979-03-16 1.92 sec. data in RTN HG_1_92S_C.TAB 1979-03-17 to 1979-03-24 1.92 sec. data in RTN HG_9_6S.TAB 1979-02-26 to 1979-03-24 9.6 sec. data in RTN HG_48S.TAB 1979-02-26 to 1979-03-24 48.0 sec. data in RTN S3_1_92S.TAB 1979-03-03 to 1979-03-16 1.92 sec. data in SYS3 S3_9_6S.TAB 1979-03-03 to 1979-03-16 9.6 sec. data in SYS3 S3_48S.TAB 1979-03-03 to 1979-03-16 48.0 sec. data in SYS3 SC_FIELD.TAB 1979-02-26 to 1979-03-24 48.0 sec. S/C field in Payload Additional information associated with this data set is available in the following files: file contents /CATALOG/MAGINST.CAT MAG instrument description /CATALOG/MAG_HG_1_92S_DS.CAT data set description for 1.92 sec RTN data /CATALOG/MAG_HG_9_6S_DS.CAT data set description for 9.6 sec RTN data /CATALOG/MAG_HG_48S_DS.CAT data set description for 48 sec RTN data /CATALOG/MAG_S3_1_92S_DS.CAT data set description for 1.92 sec SYS3 data /CATALOG/MAG_S3_9_6S_DS.CAT data set description for 9.6 sec SYS3 data /CATALOG/MAG_S3_48S_DS.CAT data set description for 48 sec SYS3 data /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 DATA in HG | \-------------------------/ Columns ====================================================================== name type description ---------------------------------------------------------------------- time a23 spacecraft event time (UT) of the sample in the format: yyyy-mm-ddThh:mm:ss.sss sclk a12 spacecraft clock in the format: MOD65536:MOD60:FDS-LINE mag_id i1 magnetometer ID (1 = LFM, 2 = HFM) Br f9.3 average of detail magnetic field R component in nT Bt f9.3 average of detail magnetic field T component in nT Bn f9.3 average of detail magnetic field N component in nT Bmag f9.3 magnitude of the averaged magnetic field components in nT avg_Bmag f9.3 average of the magnetic field magnitude over the averaging interval in nT Delta f7.3 spacecraft centered heliographic magnetic field latitude in degrees: Delta = asin(Bn/Bmag) Lambda f7.3 spacecraft centered heliographic magnetic field longitude in degrees: Lambda = atan(Bt/Br) rms_Br f8.3 root-mean-square deviation of Br over the averaging interval in nT rms_Bt f8.3 root-mean-square deviation of Bt over the averaging interval in nT rms_Bn f8.3 root-mean-square deviation of Bn over the averaging interval in nT npts i2 number of detail points in the average /-------------------------\ | 1.92 SECOND DATA in S3 | \-------------------------/ Columns ======================================================================= name type description ---------------------------------------------------------------------- time a23 spacecraft event time (UT) of the sample in the format: yyyy-mm-ddThh:mm:ss.sss sclk a12 spacecraft clock in the format: MOD65536:MOD60:FDS-LINE mag_id i1 magnetometer ID (1 = LFM, 2 = HFM) Br f9.3 average of detail magnetic field R component in nT Btheta f9.3 average of detail magnetic field Theta component in nT Bphi f9.3 average of detail magnetic field Phi component in nT Bmag f9.3 magnitude of the averaged magnetic field components in nT avg_Bmag f9.3 average of the magnetic field magnitude over the averaging interval in nT Delta f7.3 spacecraft centered heliographic magnetic field latitude in degrees: Delta = asin(Bz/Bmag)* Lambda f7.3 spacecraft centered heliographic magnetic field longitude in degrees: Lambda = atan(By/Bx)* rms_Br f8.3 root-mean-square deviation of Br over the averaging interval in nT rms_Bt f8.3 root-mean-square deviation of Btheta over the averaging interval in nT rms_Bp f8.3 root-mean-square deviation of Bphi over the averaging interval in nT npts i2 number of detail points in the average * while Br, Btheta, and Bphi are spherical coordinates, the angles Delta and Lambda are derived from Cartesian coordinates /-------------------------\ | 9.6 SECOND DATA in HG | \-------------------------/ Columns ====================================================================== name type description ---------------------------------------------------------------------- time a23 spacecraft event time (UT) of the sample in the format: yyyy-mm-ddThh:mm:ss.sss sclk a12 spacecraft clock in the format: MOD65536:MOD60:FDS-LINE mag_id i1 magnetometer ID (1 = LFM, 2 = HFM) Br f9.3 average of 1.92 second magnetic field R component in nT Bt f9.3 average of 1.92 second magnetic field T component in nT Bn f9.3 average of 1.92 second magnetic field N component in nT Bmag f9.3 magnitude of the averaged magnetic field components in nT avg_Bmag f9.3 average of the magnetic field magnitude over the averaging interval in nT Delta f7.3 spacecraft centered heliographic magnetic field latitude in degrees: Delta = asin(Bn/Bmag) Lambda f7.3 spacecraft centered heliographic magnetic field longitude in degrees: Lambda = atan(Bt/Br) rms_Br f8.3 root-mean-square deviation of Br over the averaging interval in nT rms_Bt f8.3 root-mean-square deviation of Bt over the averaging interval in nT rms_Bn f8.3 root-mean-square deviation of Bn over the averaging interval in nT npts i2 number of detail points in the average /-------------------------\ | 9.6 SECOND DATA in S3 | \-------------------------/ Columns ====================================================================== name type description ---------------------------------------------------------------------- time a23 spacecraft event time (UT) of the sample in the format: yyyy-mm-ddThh:mm:ss.sss sclk a12 spacecraft clock in the format: MOD65536:MOD60:FDS-LINE mag_id i1 magnetometer ID (1 = LFM, 2 = HFM) Br f9.3 average of 1.92 second magnetic field R component in nT Btheta f9.3 average of 1.92 second magnetic field Theta component in nT Bphi f9.3 average of 1.92 second magnetic field Phi component in nT Bmag f9.3 magnitude of the averaged magnetic field components in nT avg_Bmag f9.3 average of the magnetic field magnitude over the averaging interval in nT Delta f7.3 spacecraft centered heliographic magnetic field latitude in degrees: Delta = asin(Bz/Bmag)* Lambda f7.3 spacecraft centered heliographic magnetic field longitude in degrees: Lambda = (By/Bx)* rms_Br f8.3 root-mean-square deviation of Br over the averaging interval in nT rms_Bt f8.3 root-mean-square deviation of Btheta over the averaging interval in nT rms_Bp f8.3 root-mean-square deviation of Bphi over the averaging interval in nT npts i2 number of detail points in the average * while Br, Btheta, and Bphi are spherical coordinates, the angles Delta and Lambda are derived from Cartesian coordinates /-------------------------\ | 48 SECOND DATA in HG | \-------------------------/ Columns ========================================================================= name type description ------------------------------------------------------------------------- time a23 spacecraft event time (UT) of the sample in the format: yyyy-mm-ddThh:mm:ss.sss sclk a12 spacecraft clock in the format: MOD65536:MOD60:FDS-LINE mag_id i1 magnetometer ID (1 = LFM, 2 = HFM) Br f9.3 average of 9.6 second magnetic field R component in nT Bt f9.3 average of 9.6 second magnetic field T component in nT Bn f9.3 average of 9.6 second magnetic field N component in nT Bmag f9.3 magnitude of the averaged magnetic field components in nT avg_Bmag f9.3 average of the magnetic field magnitude over the averaging interval in nT Delta f7.3 spacecraft centered heliographic magnetic field latitude in degrees: Delta = asin(Bn/Bmag)* Lambda f7.3 spacecraft centered heliographic magnetic field longitude in degrees: Lambda = (Bt/Br) rms_Br f8.3 root-mean-square deviation of Br over the averaging interval in nT rms_Bt f8.3 root-mean-square deviation of Btheta over the averaging interval in nT rms_Bp f8.3 root-mean-square deviation of Bphi over the averaging interval in nT npts i2 number of detail points in the average dflag a8 8-byte character string which indicates software or spacecraft hardware intervention which reduces confidence in the data /-------------------------\ | 48 SECOND DATA in S3 | \-------------------------/ Columns ======================================================================== name type description ---------------------------------------------------------------------- time a23 spacecraft event time (UT) of the sample in the format: yyyy-mm-ddThh:mm:ss.sss sclk a12 spacecraft clock in the format: MOD65536:MOD60:FDS-LINE mag_id i1 magnetometer ID (1 = LFM, 2 = HFM) Br f9.3 average of 9.6 second magnetic field R component in nT Btheta f9.3 average of 9.6 second magnetic field Theta component in nT Bphi f9.3 average of 9.6 second magnetic field Phi component in nT Bmag f9.3 magnitude of the averaged magnetic field components in nT avg_Bmag f9.3 average of the magnetic field magnitude over the averaging interval in nT Delta f7.3 spacecraft centered heliographic magnetic field latitude in degrees: Delta = asin(Bz/Bmag)* Lambda f7.3 spacecraft centered heliographic magnetic field longitude in degrees: Lambda = atan(By/Bx)* rms_Br f8.3 root-mean-square deviation of Br over the averaging interval in nT rms_Bt f8.3 root-mean-square deviation of Btheta over the averaging interval in nT rms_Bp f8.3 root-mean-square deviation of Bphi over the averaging interval in nT SC R f7.3 spacecraft range from Jupiter in Jovian radii SC LAT f7.3 spacecraft SYS3 latitude in degrees SC LON f7.3 spacecraft SYS3 west longitude in degrees npts i2 number of detail points in the average dflag a8 8-byte character string which indicates software or spacecraft hardware intervention which reduces confidence in the data * while Br, Btheta, and Bphi are spherical coordinates, the angles Delta and Lambda are derived from Cartesian coordinates /-------------------------\ | SC FIELD DATA | \-------------------------/ Columns =========================================================================== name type description --------------------------------------------------------------------------- time a23 spacecraft event time (UT) of the sample in the format: yyyy-mm-ddThh:mm:ss.sss sclk a12 spacecraft clock in the format: MOD65536:MOD60:FDS-LINE mag_id i1 magnetometer ID (1 = LFM, 2 = HFM) Bx 1pe10.3 average Bx spacecraft field in nT (payload coords.) By 1pe10.3 average By spacecraft field in nT (payload coords.) Bz 1pe10.3 average Bz spacecraft field in nT (payload coords.) Bmag 1pe10.3 magnitude of spacecraft field in nT rms_Bx 1pe10.3 root-mean-square deviation of Bx over the averaging interval in nT rms_By 1pe10.3 root-mean-square deviation of By over the averaging interval in nT rms_Bz 1pe10.3 root-mean-square deviation of Bz over the averaging interval in nT npts i4 number of points in the average