PDS_VERSION_ID      = PDS3
RECORD_TYPE         = STREAM

OBJECT              = TEXT
  PUBLICATION_DATE  = 2017-02-27
  NOTE              = "Description of contents of BROWSE directory"
END_OBJECT          = TEXT
END

The four panel plots in the browse directory show examples of the scattering
behavior measured by BUG. For each sample, there are two figures showing the
behavior in a single wavelength.

As an example, consider the files ap10084_550i0.jpg and ap10084_550i_all.tif.
These illustrate the scattering behavior of sample soil 10084 in the 550nm
filter. The *i0.jpg figure shows the radiance factor (y-axis) versus emission
angle (x-axis) for the case of normal (i=0 deg) illumination.

The *_all.tif file shows four three-dimensional plots for scattering at the
incidence angles shown (i = 15 deg, 30 deg, 45 deg, and 60 deg). On each
plot, the z-axis (vertical) is radiance factor. The x and y-axes represent
the emission angle and azimuth in a polar-type plot; e = 0 deg at the center
of each plot, radiating outward to e = 80 deg at the edge. The azimuth is
relative to the incidence vector; 0 deg is at the far right side
(backscattering), 180 deg (forward scattering) is opposite it, and the plot
is azimuthally symmetric. Each plot shows a slight bump that corresponds to
the opposition surge.