/***************************************************************************/
/* MLASCIRDR.FMT V8.2                                                      */
/*             edited 13 Aug 2014 gan fixed double quote 12/31/14          */
/* Revised 21 May 2015 CHANID = A, B, C for ground triggers whose          */
/*  pulse width is invalid but may have usable range/reflectance.          */
/* Revised 17 September 2015 for new Planetary Constant definitions and    */
/* to use absolute radius rather than height above a spherical datum       */
/***************************************************************************/
OBJECT        = COLUMN
   NAME           = LONGITUDE
   COLUMN_NUMBER  = 1
   BYTES          = 9
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 1
   FORMAT         = "F9.5"
   DESCRIPTION    = "The planetocentric longitude of the laser bounce point
     producing a trigger on a given channel."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = LATITUDE
   COLUMN_NUMBER  = 2
   BYTES          = 10
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 11
   FORMAT         = "F10.5"
   DESCRIPTION    = "The planetocentric latitude of the laser bounce point
     producing a trigger on a given channel."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = RADIUS
   COLUMN_NUMBER  = 3
   BYTES          = 9
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 22
   FORMAT         = "F9.4"
   UNIT           = "KM"
   DESCRIPTION    = "The planetary radius at the laser bounce point. Altitude
     was previously measured with respect to a reference sphere about the
     center of mass, but is now the total planetary radius."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = ET_FIRE
   COLUMN_NUMBER  = 4
   BYTES          = 17
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 32
   FORMAT         = "F17.6"
   UNIT           = "SECOND"
   DESCRIPTION    = "The independent variable of the equations of motion in
     the Solar System Barycentric frame at the laser fire time, in ET seconds
     from the J2000 epoch, also known as Ephemeris Time or Coordinate Time.
     Its practical realization is the project-supplied clock kernel, applied
     to the Spacecraft Clock Mission Elapsed Time (MET_SECONDS) that is
     transmitted to MESSENGER subsystems by the Integrated Electronics Module
     at the time of the 1 PPS signal. The NAIF SPICE spacecraft clock (SCLK)
     kernel determines a corresponding Terrestrial Dynamic Time. These times 
     are synchronous with respect to an observer at the Solar System
     barycenter.  The SPICE library routine SCS2E performs the conversion 
     to Ephemeris Time as used by the JPL Planetary Ephemeris."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   COLUMN_NUMBER  = 5
   BYTES          = 10 
   START_BYTE     = 50
   NAME           = MET_SECONDS
   DATA_TYPE      = ASCII_INTEGER
   FORMAT         = "I10"
   DESCRIPTION    = "Spacecraft mission elapsed time."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = SHOT_NUMBER
   COLUMN_NUMBER  = 6
   BYTES          = 2
   START_BYTE     = 61
   DATA_TYPE      = ASCII_INTEGER
   FORMAT         = "I2"
   DESCRIPTION    = "Number of 8 Hz shot or minor frame, 0-7" 
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = CHANID
   COLUMN_NUMBER  = 7
   BYTES          = 2
   DATA_TYPE      = ASCII_INTEGER
   FORMAT         = "I2"
   START_BYTE     = 64
   DESCRIPTION    = "Receiver channel of ground or noise trigger -
                     =0 channel 1 high threshold.
                     =1 channel 1 low
                     =2 channel 2 low
                     =3 ambiguous, assigned to channel 1 low
                     =4 channel 3 low.
                     =5 channel 1 high noise trigger
                     =6 channel 1 low noise trigger
                     =7 channel 2 low noise trigger
                     =8 unassigned noise trigger
                     =9 channel 3 low noise trigger.
                     =A channel 1 high trigger with
                        invalid STARTPLS_WIDTH.
                     =B channel 1 low ground trigger with
                        invalid STARTPLS_WIDTH.
                     =C channel 2 low ground trigger with
                        invalid STARTPLS_WIDTH."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = PULSE_WIDTH
   COLUMN_NUMBER  = 8
   BYTES          = 6
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 67
   FORMAT         = "F6.1"
   DESCRIPTION    = "Received pulse width, nanoseconds."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = THRESHOLD
   COLUMN_NUMBER  = 9
   BYTES          = 7
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 74
   UNIT           = "VOLT"
   FORMAT         = "F7.4"
   DESCRIPTION    = "Discriminator threshold on receiver channel CHANID."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = VGA_GAIN
   COLUMN_NUMBER  = 10
   BYTES          = 6
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 82
   FORMAT         = "F6.3"
   DESCRIPTION    = "Variable gain amplifier gain factor."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = RANGE
   COLUMN_NUMBER  = 11
   BYTES          = 10
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 89
   UNIT           = "KM"
   FORMAT         = "F10.4"
   DESCRIPTION    = "Range from spacecraft center of mass
        to bounce point, km.
        The time of flight from the laser transmit start pulse to
        the bounce point on Mercury, as seen by an observer at the
        Solar System barycenter, is calculated iteratively from
        the two-way time of flight using the spacecraft and planetary
        ephemerides in an inertial frame, and multiplied by the
        speed of light constant, 299,792.458 km/s. The range has been
        corrected for the offset of the laser zero-range point to the
        S/C COM  in the boresight direction."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = EMISSION_ANGLE
   COLUMN_NUMBER  = 12
   BYTES          = 6
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 100
   FORMAT         = "F6.2"
   DESCRIPTION    = "Angle at a surface bounce point between a vector to 
     MLA, and a radial vector from the center of mass."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = TX_ENERGY
   COLUMN_NUMBER  = 13
   BYTES          = 5
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 107
   UNIT           = "MILLIJOULE"
   FORMAT         = "F5.1"
   DESCRIPTION    = "The measured transmitted pulse energy
       for the current SHOT_NUMBER."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = UTC
   COLUMN_NUMBER  = 14
   BYTES          = 25
   DATA_TYPE      = TIME
   START_BYTE     = 113
   DESCRIPTION    = "Laser shot time origin T0,
     converted to Coordinated Universal Time (UTC).
     The project-supplied clock kernel and NAIF routines convert MET into
     Terrestrial Dynamical Time (TDT) seconds past the J2000 epoch, and by
     accounting for leap seconds and the 32.184 s offset between TDT
     and UTC, to a standard calendar representation of UTC. The laser fire
     occurs about 0.97 to 1 ms after T0."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = TIME_OF_FLIGHT
   COLUMN_NUMBER  = 15
   BYTES          = 11
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 139
   UNIT           = "NANOSECOND"
   FORMAT         = "F11.1"
   DESCRIPTION    = "Two-way time of flight, corrected for zero-range
     delay to spacecraft center of mass, in ET nanoseconds."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = SAT_LONGITUDE
   COLUMN_NUMBER  = 16
   BYTES          = 10
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 151
   FORMAT         = "F10.5"
   DESCRIPTION    = "The planetocentric longitude of MESSENGER 
     at the time of fire."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = SAT_LATITUDE
   COLUMN_NUMBER  = 17
   BYTES          = 10
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 162
   FORMAT         = "F10.5"
   DESCRIPTION    = "The planetocentric latitude of MESSENGER 
     at the time of fire."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = SAT_ALTITUDE
   COLUMN_NUMBER  = 18
   BYTES          = 10
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 173
   FORMAT         = "F10.5"
   UNIT           = "KM"
   DESCRIPTION    = "The altitude of MESSENGER with respect to a 
     reference surface about the center of mass, currently a sphere 
     of 2440 km radius."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = OFFNADIR_ANGLE
   COLUMN_NUMBER  = 19
   BYTES          = 8
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 184
   FORMAT         = "F8.3"
   DESCRIPTION    = "Angle between a vector from MLA to the bounce 
     point, and a vector from MLA to the center of mass."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = PHASE_ANGLE
   COLUMN_NUMBER  = 20
   BYTES          = 8
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 193
   FORMAT         = "F8.3"
   DESCRIPTION    = "Solar phase angle at the bounce point."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = SOLAR_INCIDENCE_ANGLE
   COLUMN_NUMBER  = 21
   BYTES          = 7
   DATA_TYPE      = ASCII_REAL
   START_BYTE     = 202
   FORMAT         = "F7.2"
   DESCRIPTION    = "Angle at a surface bounce point between a vector to 
     Sun and a radial vector from the center of mass."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = SC_RANGE
   COLUMN_NUMBER  = 22
   BYTES          = 6
   DATA_TYPE      = ASCII_INTEGER
   START_BYTE     = 210
   FORMAT         = "I6"
   DESCRIPTION    = "The spacecraft range value used by the science task for 
      algorithm calculations, in units of approximately 30 meters per count.
      This value is calculated in real time by the spacecraft using its
      attitude and position knowledge relative to the planet. The range
      is provided to the instrument asynchronously at one second intervals.
      As soon as the science task receives a range message, it begins using
      the new range in its calculations. This value is an estimate only.
      The spacecraft range reported in telemetry may NOT be the one used
      throughout the entire second of algorithm calculations."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
   NAME           = SEQUENCE_ID
   COLUMN_NUMBER  = 23
   BYTES          = 6
   DATA_TYPE      = ASCII_INTEGER
   START_BYTE     = 217
   FORMAT         = "I6"
   DESCRIPTION    = "Unique sequential identifier for triggers recorded by
     the range measurement unit in the Calibrated Data Record. Many triggers
     lie well outside the normal slant range window and are discarded. The
     SEQUENCE_ID allows ground/noise editing to be transferred from previous
     processing versions."
END_OBJECT    = COLUMN

OBJECT        = COLUMN
  NAME             = STARTPLS_WIDTH
  COLUMN_NUMBER    = 24
  BYTES            = 4
  DATA_TYPE        = ASCII_REAL
  START_BYTE       = 225
  FORMAT           = "F4.1"
  UNIT             = "nanosecond"
  MISSING_CONSTANT = 99.9
  DESCRIPTION      = "Width of transmit laser pulse in nanoseconds, used
    to determine centroid time of outgoing pulse. A value of 99.9
    denotes a measurement whose pulse width is invalid. In addition,
    this value is set to indicate an uncertain start time, leading to
    highly degraded range accuracy."
END_OBJECT    = COLUMN