SSI Raw Experiment Data Record (REDR) for Phase 2 - USGS PDS ...

Solid State Imaging Raw Experiment Data Record Software Interface Specification
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Table 4-3. VICAR Label Keywords and Descriptions - Continued
LABEL ITEM DESCRIPTION SOURCE
TRUTH_WINDOW=(sl,ss,nl,ns)
sl,ss,nl,ns=integer
Starting line and starting sample, and number of
lines and number of samples of an up to 96x96
pixel truth window; it’s the area where no
compression was performed. Defaulted to
(801,801,96,96) when no truth window exist and
when ENCODING_TYPE=HUFFMAN. See
notes.
TWIST=real Twist angle (0-360) VIEW,
SPICE
UBWC=string Uneven-bit-weight correction (ON or OFF) GALSOS
VSCL=real Vertical picture scale (m/pixel) VIEW,
SPICE
ZIGZAG_PATTERN=string
(7 characters)
Name of ICT zigzag coding pattern (ZIGZAG or
ALT). Defaulted to ZIGZAG for
ENCODING_TYPE=HUFFMAN. See notes.
RTS
ICT
Notes:
1) Sources are:
RAW=ssiraw table of database
RTS=real time system,
VIEW=ssioverview table of database,
ICT=ssiict table of database,
OPNAV=ssiopnav table of database,
GALSOS=radiometric correction program,
SPICE=SPICE kernels, typically via the CATLABEL program.
2) If the target is the ring-plane of Jupiter, label items LAT and LON are replaced by RAD
and LON.
3) Prior to JOI, MOFIBE was FIBE and ENCODING_TYPE was BARC.
4) TBPPXL, TPPLNE apply to BARC compression only.
5) QUANTIZATION_STEP_SIZE, QUANTIZATION_MATRIX_NAME,
TRUTH_WINDOW, ICT_DESPIKE_THRESHOLD and ZIGZAG_PATTERN apply to ICT
compression only and are defaulted for Huffman only (lossless) compression.
MINIMUM_COMPRESSION_RATIO, MAX_COMPRESSION_RATIO, and
COMPRESION_RATIO, apply to both ICT aand Huffman (lossless) compression.
CUT_OUT_WINDOW applies to ICT, Huffman only (lossless), and BARC compression
6) HUFFMAN_TABLE applies to Huffman only (lossless) and ICT compression images. Note
that ICT compressed images are also HUFFMAN compressed but are identified as ICT.
7) NSTARS,STAR1,STAR2,STAR3,STAR4 and STAR5 apply to OPNAV images only.
8) All azimuth angles are measured clockwise from right in the image.
9) An image "size field" defines the location and size of an image area. It consists of four
numbers: starting line, starting sample, number of lines, and number of samples. The origin
of the image coordinate system is at (LINE,SAMPLE)=(1,1) for the upper-left corner, with
samples increasing to the right and lines increasing downwards.
10) INA, EMA, PHA, HRA, SMEAR, HSCL, VSCL, SLRANGE, LAT, and LON are calculated
at the center of the image if all four corners lie on the target, other wise it is calculated at