CCSD3ZF0000100000001NJPL3IF0PDS200000001 = SFDU_LABEL
/* Detached PDS label for the PV-ORAD */
/* corrected Fresnel reflectivity image */
RECORD_TYPE                    = FIXED_LENGTH
RECORD_BYTES                   = 8192
FILE_RECORDS                   = 1025
/* Pointers to image file and objects within it */
^FOREIGN_LABEL                 = ("PVEN004F.IMG",1)
^IMAGE                         = ("PVEN004F.IMG",2)
/* Image descriptive information */
DATA_SET_ID                    = "P12-V-ORAD-5-RADAR-IMAGE-V1.0"
TARGET_NAME                    = VENUS
SPACECRAFT_NAME                = "PIONEER VENUS ORBITER"
INSTRUMENT_NAME                = "ORBITING RADAR"
TRANSMITTED_POLARIZATION       = "LINEAR"
RECEIVED_POLARIZATION          = "SAME SENSE LINEAR"
WAVELENGTH                     = 17. <CENTIMETERS>
DATA_SET_PARAMETER_NAME        = FRESNEL_REFLECTIVITY
DATA_SET_PARAMETER_UNIT        = "N/A"
MAP_PROJECTION_TYPE            = "SIMPLE CYLINDRICAL"
MAP_SCALE                      = 5.686 <PIXEL/DEGREE>
MAXIMUM_LATITUDE               = 90.0 <DEGREES>
MINIMUM_LATITUDE               = -90.0 <DEGREES>
MAXIMUM_LONGITUDE              = 240.0 <DEGREES>
MINIMUM_LONGITUDE              = 240.0 <DEGREES>
PRODUCER_FULL_NAME             = "PETER G. FORD"
NOTE                           = "VICAR format image of Venus surface
      Fresnel reflectivity corrected for diffuse scattering from radar
      altimeter and side-looking backscatter measurements.  This is
      related to the (complex) surface bulk dielectric constant E by
      ((sqrt(E)-1)/(sqrt(E)+1))**2.  The Fresnel reflectivity is derived
      by analyzing the time-sampled radar echo profile according to
      Hagfors' Law of near-normal-incidence scattering from a quasi-
      specular surface.  A correction is made to the Fresnel
      reflectivity to account for that fraction of the incident radar
      beam that is reflected by sub-wavelength-sized scatterers.  This
      component was estimated, where possible, from the ORAD side-
      looking radar imaging mode, and modeled by the phenomenological
      function g*a*R*cos(t)**1.5, where t is the scattering angle, g =
      2.69 is a fitted geometrical factor, and a is the fraction of the
      surface covered by diffusely-scattering material.  R is the true
      Fresnel reflectivity.  The correction is only made for that
      portion of the altimetric dataset that is also covered by side-
      looking imaging data, i.e. from about 15 degrees south to 45
      degrees north latitude.  For reference, see Pettengill, G.H., P.G.
      Ford, and B.D. Chapman, Venus: Surface electromagnetic properties,
      J. Geophys. Res., 93, 14881-14892, 1988."
/* Object descriptions */
OBJECT                         = FOREIGN_LABEL
   TYPE                        = VICAR2
   RECORDS                     = 1
   BYTES                       = 8192
   ^DESCRIPTION                = "VICAR2.TXT"
END_OBJECT                     = FOREIGN_LABEL
OBJECT                         = IMAGE
   LINES                       = 1024
   LINE_SAMPLES                = 2048
   SAMPLE_BITS                 = 32
   SAMPLE_TYPE                 = VAX_REAL
END_OBJECT                     = IMAGE
END