PDS_VERSION_ID               = "PDS3"

RECORD_TYPE                  = FIXED_LENGTH
RECORD_BYTES                 = 82
FILE_RECORDS                 = 6480
^ARRAY                       = "JBL070D1.DAT"

SPACECRAFT_NAME              = "LUNAR PROSPECTOR"
TARGET_NAME                  = "MOON"
INSTRUMENT_NAME              = "RADIO SCIENCE SUBSYSTEM"
DATA_SET_ID                  = "LP-L-RSS-5-GRAVITY-V1.0"
PRODUCT_ID                   = "JBL070D1.DAT"
PRODUCT_RELEASE_DATE         = 1998-03-11
DESCRIPTION                  = "This file contains a digital,
1 X 1 degree resolution grid of Bouguer gravity anomalies of
the moon.  It is a 360 x 180 grid from 89.5 to -89.5 degrees
latitude, and -180.0 to 179.0 degrees longitude.  The observation is
Bouguer vertical gravity in milligals at the surface referenced to a
sphere of 1738.0 km radius.  The Bouguer anomaly is the observed gravity
as given by the indicated gravity model minus the theoretical gravity
from the topography model. A crustal density of 2.8 and mean density of
3.34 gm/cm^3 are used together with the GLTM-2C 90th degree and order
topography model (Smith et. al., 1997, Topography of the Moon from the
Clementine Lidar, Journal of Geophysical Research, 102, 1591-1611) to
determine the theoretical gravity.  The degree one terms are not included
and there is no correction for maria fill.  The method of computing the
theoretical gravity of a topography model was done by expanding in powers
(Wieczorek and Phillips, 1998, Potential Anomalies on a Sphere:
Applications to the Lunar Crust, Journal of Geophysical Research, 103,
1715-1724).  The anomaly may be from a truncation in degree of a
delivered gravity field.  The naming convention for the degree used
is, e.g., JBL070D where 70 indicates the maximum degree of the gravity
field used to create the grid."

OBJECT                   = ARRAY
  NAME                       = "2-D GRID OF BOUGUER ANOMALIES"
  INTERCHANGE_FORMAT         = ASCII
  AXES                       = 2
  AXIS_ITEMS                 = (180,360)
  AXIS_NAME                  = (LATITUDE,LONGITUDE)
  AXIS_UNIT                  = (DEGREE,DEGREE)
  AXIS_INTERVAL              = (-1.0,1.0)
  AXIS_START                 = (89.5,-180.0)
  AXIS_STOP                  = (-89.5,179.0)
  FORMAT                     = "F8.2"
  SAMPLE_BITS                = 64
  DESCRIPTION                = "This is a 2-D grid of the Bouguer gravity
  anomalies of the Moon in milligals (1 milligal = 0.01 mm/s/s).  The
  file contains 180 blocks of 36 records, with each record containing
  10 Bouguer anomaly values plus an ASCII carriage-return line-feed
  pair as a delimiter.  The first block contains values at 89.5N latitude;
  the first value in the first record is the Bouguer anomaly at
  (89.5N, 180.0W)."
END_OBJECT               = ARRAY

END