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TYPE_OF_FILE_NAME: DC FILE
FILE_ATTRIBUTES: Variable length, sequential file
RECORD_LENGTH: 
 A. HEADER_RECORD: 41 bytes
 B. DATA_POINT_RECORD: 80 bytes

TYPE_OF_FILE_DESCRIPTION:
This file contains the San Marco EFI DC data (8 points per second). File names
are of the form described in the VOLDESC.SFD. The first record contains the 
name of the original binary file from which the archive file was created and
the contact potential values used to compute the high resolution data
contained in the file.  Every record thereafter is a data record containing the
date and time of the data in the record, the despun electric field vector in
spacecraft coordinates (as described in the VOLDESC.SFD file), the non-reduced
telemetry voltages of the plasma ion densities measured by the University of
Texas  plasma duct electrometer, and several orbital parameters for that time.
The time interval between data points is normally 0.128 seconds but gaps may
occur. Using the time tag of every record is recommended.

FORMAT_OF_THE_HEADER_RECORD:

 BYTE            FIELD                 TYPE           VALUE          UNITS
NUMBER          CONTENTS              VI/VR/C         RANGE

1  - 20    Source DBA Name           Character           -            -

22 - 27    Contact potential Ecx     ASCII real       -8 - 4    Millivolts/meter

29 - 34    Contact potential Ecy     ACSII real       -8 - 4    Millivolts/meter
 
36 - 41    Contact potential Ecz     ASCII real       -8 - 4    Millivolts/meter

Record format: A20,3(1X,F6.2)

FORMAT_OF_THE_DATA_POINT_RECORD:

 BYTE            FIELD                 TYPE           VALUE          UNITS
NUMBER          CONTENTS              VI/VR/C         RANGE

1  -  5    Date of the data in      ASCII integer    88102 -      Julian Date
           the record                                88341          (YrDoy)

7  - 14    Time of the data in      ASCII integer    0 -          Milliseconds
           the record                                86400000

16 - 22    Ex in spacecraft         ASCII real       +/- 20     Millivolts/meter
           coordinates                            

24 - 30    Ey in spacecraft         ASCII real       +/- 20     Millivolts/meter
           coordinates                            

32 - 32    Day Night Flag           ASCII real       0 - 1 (day)      -

34 - 40    Altitude of the          ASCII real       0 - 1300      Kilometers
           satellite above the 
           spheroid 

42 - 48    Geographic latitude      ASCII real       -90  -  90    Degrees

50 - 56    Geographic longitude     ASCII real       -180 - 180    Degrees

58 - 64    Local Solar Time         ASCII real       0  -  24      Hours

66 - 72    Magnetic Dip Latitude    ASCII real       0  -  84.26   Degrees

74 - 80    Plasma Ion Densities     ASCII real       0 - 5         Volts
                                                                (Log compressed)

Record format: I5,1X,I8.8,2(1X,F7.2),1X,I1,6(1X,F7.2)


Filled data value for all OA and electric field parameters is -999.99.

FORMAT_APPLY_SCOPE: This format applies to all the files under the [DC] 
subdirectory.
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