PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM

OBJECT                = TEXT
   PUBLICATION_DATE    = 2016-03-04
   NOTE                = "Description of contents of EXTRAS directory"
END_OBJECT            = TEXT
END

The TRDR EXTRAS visualizations are Portable Network Graphics (PNG) format 
files that depict the geometry and structure of CRISM hyperspectral targeted 
observations. The TRDR detector specific visualizations have file names with 
the form [Class Type][Target ID]_[Sensor]_[Name].PNG, where
 
[Class Type] is a three letter observation type code (e.g. FRT, HRL, HRS), 
[Target ID] is an eight character hexadecimal observation identifier, 
[Sensor] is a single character indicating the VNIR (S-detector) or IR 
(L-detector) wavelength range, and 
[Name] indicates the plot contents.

TRR3 I/F Observation Geometry:
Two CRISM targeted observation geometry plots are color coded with the 
inbound EPF branch in blue, the central scan in green, and the outbound EPF 
branch in red. 

[Class Type][Target ID]_[Sensor]_PHA_EMI.PNG - Cartesian plot showing phase 
angle (g) vs. emission angle (e). The observation median incidence angle is 
plotted as a black sun symbol at [g = i, e = i] for completeness. The 
minimum sampled emission angle is marked by a black asterisk on the 
abscissa. This value approximates the S/C roll angle, ignoring planetary 
curvature. The minimum and maximum phase angle sampled by each observation 
section (inbound EPFs, central scan, outbound EPFs) are marked with colored 
asterisks on the ordinate. 

[Class Type][Target ID]_[Sensor]_EMI_AZI.PNG - Polar plot showing emission 
angle (e) vs. azimuth angle (phi). The 360 deg. azimuth space has been 
folded about the principal plane (phi = 0 deg.; phi = 180 deg.) to reduce 
redundancy. In this coordinate system the sub-solar azimuth is phi = 180 deg.
and the zero phase point lies along phi = 0 deg. The incidence angle is 
plotted as a black sun symbol at [e = i, phi = 90 deg. + i] for completeness.

TRR3 I/F Observation Structure:
Two CRISM targeted observation structural plots provide visibility into the 
spatial, spectral, and geometric variability.

[Class Type][Target ID]_[Sensor]_GIMBALED.PNG - Multi-component plot with 
the targeted observation sections color-coded as in the geometric plots 
(inbound EPFs in blue, central scan in green, outbound EPFs in red). 
(Bottom) Median spectrum of each targeted observation segment. The dotted 
vertical line indicates the reference wavelength for the other plot 
components. 
(Middle) Distribution boxplots for each observation segment. The vertical 
dotted and dashed lines indicate the stretch limits for the remaining plot 
components. 
(Upper Left) All observation segments at the reference wavelength displayed 
with the stretch limits indicated by the dotted vertical lines in the 
distribution boxplot component. The central scan is shown at a reduced 
spatial sampling. (Upper Right) Observation central scan at the reference 
wavelength show at full spatial resolution with the stretch limits indicated 
by the dashed vertical lines in the distribution boxplot component. 

[Class Type][Target ID]_[Sensor]_COMPOSITE.PNG - A three panel display 
showing the spectral variability of the targeted observation central scan. 
The visualization includes a false color RGB composite with a 0.5 percent 
linear stretch on each band, a spectral plot with the scene median and 
5-95 percent spectral envelope (dashed lines indicate RGB band wavelengths), 
and distribution boxplots for the three bands in the RGB composite (dashed 
lines indicate RGB band stretch limits).