This is the README file for LAPIB

LAPIB contains the Dynamics Explorer-2 (D2) magnetic field data in Spacecraft
Coordinates which was included with the LAPI VAX binary data file.  The LAPI
experiment contained its own magnetometer which it used to direct the steering
of its scan platform and control which of the 0 deg and 180 deg sensors were
selected for measurements.  The LAPI magnetometer should be considered an 
aspect magnetometer, not of the quality of the MAGB experiment.  The LAPI
magnetometer was not calibrated and does not have the resolution of the MAGB
magnetometer.  Science analysis should not be conducted with the LAPI 
magnetometer if possible.  Usage of the LAPI magnetometer should be restricted
to times when MAGB data is not available.  The following extraction of LAPI
magnetometer values included within the CDF file are the following:

 Sensor  Parameter             Unit             valid Range
   0     LAPI Bx                nT              -65,000 to 65,000
   1     LAPI By                nT              -65,000 to 65,000
   2     LAPI Bz                nT              -65,000 to 65,000
   3     LAPI Bxy               nT              -65,000 to 65,000
   4     LAPI B                 nT              -65,000 to 65,000

Here Bxy is the magnitude projection of the magnetic field in the x-y plane of
the spacecraft (the same plane as the LAPI sensors) and B is the magnitude of 
the total magnetic field.  All variables are stored as 4 byte real numbers 
where -3.4e+38 is used to indicate a fill value.  LAPI magnetometer values
are synchronized with the LAPI particle data and are generated at a rate of 
one value every second.  Magnetometer values are considered instantaneous 
measurements.  They have no accumulation period, only data latency between 
measurements.

Additional available units in the CDF are Gauss and Tesla

A status byte is included in this CDF and indicates the Status of 
processing achieved at Goddard Space Flight Center (GSFC).  

    Status  Meaning                        Number of Bits
      0     SPDF Status Flag - All               8

Each bit which makes up the status byte was extracted so that each bit
could be individually examined.  These were labeled starting at bit 0
as follows:

    Status  Meaning                        Number of Bits
      1     SPDF StatusFlag - Bit 7              1
      2     SPDF StatusFlag - Bit 6              1
      3     SPDF StatusFlag - Bit 5              1
      4     SPDF StatusFlag - Bit 4              1
      6     SPDF StatusFlag - Bit 3              1
      7     SPDF StatusFlag - Bit 2              1
      8     SPDF StatusFlag - Bit 1              1
      9     SPDF StatusFlag - Bit 0              1

The SPDF Status byte defines the processing undergone when converting 
the original DE telemetry from its Sigma-9 format to its VAX binary format.
The SPDF Status byte was meant to describe the values that were encountered 
when reading the Sigma-9 magnetic tape.  Bits 3, 6, and 7 are contained 
within Status 0.  Bit 3 indicates the SPDF Bad Sensor ID, bit 6 when the 
SPDF Previous Sensors Differs from the current sensors, and bit 7 when the 
SPDF detected a Time Gap in telemetry.  The remainder of the bits were
not defined in the SPDF documentation.  These SPDF flags are specific to 
LAPI sensor data and telemetry.