PDS_VERSION_ID               = "PDS3"

RECORD_TYPE                  = FIXED_LENGTH
RECORD_BYTES                 = 84
FILE_RECORDS                 = 6480
^ARRAY                       = "THICKGRD.DAT"

SPACECRAFT_NAME              = "CLEMENTINE 1"
TARGET_NAME                  = "MOON"
INSTRUMENT_NAME              = "RADIO SCIENCE SUBSYSTEM"
DATA_SET_ID                  = "CLEM1-L-RSS-5-GRAVITY-V1.0"
PRODUCT_ID                   = "THICKGRD-DAT"
PRODUCT_RELEASE_DATE         = 1996-01-01
DESCRIPTION                  = "This file contains a digital,
1 X 1 degree resolution grid of the crustal thickness of the
Moon.  It is a 360 X 180 grid from 89.5 to -89.5 degrees
latitude, and 0.5 to 359.5 degrees longitude.  The array values
are crustal thickness in kilometers.  A complete Bouguer
correction was applied to the lunar gravity field, using the
newly derived topography from Clementine.  Additional corrections
were applied for the added mass of mare basalts, using the
thicknesses given for eight major basins in Solomon and Head
(Reviews of Geophysics, v. 18, p. 107-141, 1980).  The resulting
Bouguer anomalies were then inverted for the topography of the
lunar moho (Mohorovicic Discontinuity), assuming a constant
density crust (2800 kg/m3) and mantle (3300 kg/m3).  The
difference between the inferred moho topography and the surface
topography is referred to as the crustal thickness.  Smooth
downward continuation of the Bouguer anomalies to a 61 km mean
depth to the moho matches the 55 km crustal thickness obtained at
the Apollo 12 and 14 landind sites."

OBJECT                   = ARRAY
  NAME                       = "2-D GRID OF CRUSTAL THICKNESS"
  INTERCHANGE_FORMAT         = ASCII
  AXES                       = 2
  AXIS_ITEMS                 = (180,360)
  AXIS_NAME                  = ("LATITUDE","LONGITUDE")
  AXIS_UNIT                  = (DEGREES,DEGREES)
  AXIS_INTERVAL              = (1.0,1.0)
  FORMAT                     = "F8.3"
  SAMPLE_BITS                = 64
  DESCRIPTION                = "This is a 2-D grid of the crustal
  thickness of the Moon in kilometers"
END_OBJECT               = ARRAY

END