Document title: Format description for NDADS ISEE1 and ISEE2 4-second flat-file 
magnetometer datatype MAG_4S_FF
Project: ISEE1 and ISEE2
NDADS Datatype: MAG_4S_FF
Super-EID: DOCUMENT
There may be other documents also identified by this super-EID.
NDADS filename: 4SECOND.SFD
TRF entry: b46615.txt in NSSDC's controlled digital document library, Mar. 1998.
Document text follows:
----------------------

CCSD3ZF0000100000001CCSD3FF0000500000001CCSD3CS00004markeraa
ADIDNAME = NSSD0061;
SUPID = NSSD0211;
DDRID = NSSD0211;
CCSD$$MARKERmarkeraaNSSD3KS00020markerbb

ADIDNAME = "NSSD0061";
REVISION_NUMBER = 1;
SUBMISSION_DATE = 1994-09-21;
REGISTRATION_DATE = 1995-03-17;
REVISABLE = Y;
RELEASABLE= Y;
EXPECTED_RELEASE_DATE = 1995-03-17;

BRIEF_TITLE = "ISEE 4-second Magnetometer data";

BRIEF_DESCRIPTION = "ISEE 4-second averaged magnetic field data
including the magnetic total field value and the magnetic field
vector values (Bx, By, and Bz) in the spacecraft coordinates.";

REVISION_COMMENT =  "No data was ever released with Revision 0. This
revision combines the date and time fields into a single time field.
Corrects field descriptions and adds DATA_ORGANIZATION_NOTE to
description.";

GROUP = REGISTRANT;
  TITLE = Mr.;
  FIRST_NAME = Harry;
  MIDDLE_NAME =  "";
  LAST_NAME = Herbert;
  AFFILIATION = "Univ. of California";
  GROUP = ADDRESS;
     ADDRESS_LINE = "University of California at Los Angeles";
     ADDRESS_LINE = "Institute of Geophysics and Planetary Physics";
     ADDRESS_LINE = "5833 Slichter Hall";
     ADDRESS_LINE = "Los Angeles, CA  90024-1567 USA";
  END_GROUP;

  GROUP = EMAIL_ADDRESS;
      NETWORK = NSI/DECnet;
      NET_ADDRESS = "BRUNET::HARRY";
  END_GROUP;
  GROUP = EMAIL_ADDRESS;
      NETWORK = NSI;
      NET_ADDRESS = "hherbert@igpp.ucla.edu";
  END_GROUP;

    PHONE = "+1-310-825-9030";
    FAX   = "+1-310-206-3051";
END_GROUP;

GROUP = REVISOR;
  TITLE = Mr.;
  FIRST_NAME = Harry;
  MIDDLE_NAME =  "";
  LAST_NAME = Herbert;
  AFFILIATION = "Univ. of California";
  GROUP = ADDRESS;
     ADDRESS_LINE = "University of California at Los Angeles";
     ADDRESS_LINE = "Institute of Geophysics and Planetary Physics";
     ADDRESS_LINE = "5833 Slichter Hall";
     ADDRESS_LINE = "Los Angeles, CA  90024-1567 USA";
  END_GROUP;

  GROUP = EMAIL_ADDRESS;
      NETWORK = NSI/DECnet;
      NET_ADDRESS = "BRUNET::HARRY";
  END_GROUP;
  GROUP = EMAIL_ADDRESS;
      NETWORK = NSI;
      NET_ADDRESS = "hherbert@igpp.ucla.edu";
  END_GROUP;

    PHONE = "+1-310-825-9030";
    FAX   = "+1-310-206-3051";
END_GROUP;

REFERENCED_ADID = NSSD0211;

PROJECT_NAME = "";
MISSION_NAME =  "International Sun Earth Explorer (ISEE)";
INSTRUMENT_NAME =  "Fluxgate Magnetometer";

CCSD$$MARKERmarkerbbCCSD3DS00002markercc

TYPE_OF_FILE_NAME:                4-SECOND DATA
RECORD_TYPE_NAMES:                MAGNETIC_FIELD

FILE_ATTRIBUTES:                  SEQUENTIAL, FIXED_RECORD_LENGTH
FIXED_RECORD_TYPE_LENGTH:         24 BYTES
NUMBER_OF_DATA_FIELDS:            5
FIELD_SYNTAX_OF_DATA_FIELD_001:   8-BYTE VMS_FLOATING_POINT
FIELD_SYNTAX_OF_DATA_FIELDS_002_THRU_005:
                                  4-BYTE VMS_FLOATING_POINT

CONTENTS_OF_EACH_DATA_POINT_RECORD:

 NUM NAME      UNITS     FIELD DESCRIPTION
 --- --------- --------- -----------------------------------------------------
 001 TIME      SECONDS   Seconds since Jan. 1, 1966 at 00:00:00.000
 002 BX SC     NT        4 second average of Bx in spacecraft coordinates
 003 BY SC     NT        4 second average of By in spacecraft coordinates
 004 BZ SC     NT        4 second average of Bz in spacecraft coordinates
 005 BT        NT        4 second average of total field


RECORD_TYPE_ALGORITHMS:
 The 4-byte fields of a 4-second data record are initialized with a fill value
 greater than 1.0E30, usually 1.0E34, and subsequently the geophysical values
 are inserted. Thus if there is no data available for a given parameter that
 particular field will contain the fill data value.

DATA_ORGANIZATION_NOTE:
 In the ISEE 4-second averaged magnetic field data files the magnetic field
 vector values (BX, BY and BZ) preceed the total field value (BT) in each data
 record.  Conversely, in the 60-second averaged magnetic field data files the
 total field value (BT) preceeds the magnetic field vector values (BX, BY
 and BZ) in each data record.  The time associated with each observation
 corresponds to the mid-point of the observation interval.

CCSD$$MARKERmarkercc