Level 2 Help for TIMSPIX

The user must provide the base name for the datasets used. For example,
to process "HAWAII32.PIX" and "HAWAII32.AUX" the name "HAWAII32" must be
given.  This procedure will then generate output datasets with the names
"HAWAII32.RED", "HAWAII32.GRN", and "HAWAII32.BLU" as needed.

The user must provide the symbolic name of the tape device upon which the
TIMS data tape is mounted. This name is defined with the VICAR procedure
TMOUNT

The user must provide the name of the flight line extracted from the TIMS
data tape. The names are of the form "HAWAII 132".

The user must specify the NASA center responsible for the TIMS flight.
TIMS is operated by the AMES Research Center and the Stennis Space Center
(which is identified by the obsolete name NSTL)

The user must specify the position of the flight line file on the AMES
or NSTL tape.

The user must specify the number of scanlines in the TIMS data file

User's choice of a calibration option. The default is to calibrate the data.
When this option is in effect, the six calibrated channel files are written 
to disk.

Optional specification of the subarea of the image that will be used to calculate
statistics for the fitting of halfword data to byte data. The byte imagery thus 
created is input to the D-stretch algorithm. The specification of this area is 
only required when the calibrated (CAL) mode is selected. The default in CAL mode 
is to use the entire image to calculate the statistics. 

The can can elect to perform a panarama, or aspect ratio, correction of 
the data by choosing YES. The parameter ASPECT is used to set the aspect
ratio of the corrected data.

Aspect (or horizontal to vertical) ratio used in the panorama correction (C130RECT). 
The default is 1.0, which implies that the two dimensions are equal. With ASPECT=1, 
the corrected TIMS image will have 753 samples (or pixels) per line.

Optional subareas for the training of the D-STRETCH. If subareas are specified, 
the data from these areas are used to calculate the correlation matrix. The default
is to use the entire image to calculate the correlation matrix.

Optional length for the stripping of the playback image. If no stripping is desired, 
the user should enter the number lines in the image for LENGTH. The default is to use 
a strip length of 3500 lines to create the playback image.

TIMSCAL uses the date of data acquisition to determine the proper calibration 
coefficients.  If defaulted, the date in the VICAR label is used. This parameter 
is needed only if the VICAR label is incorrect, or if an abnormal calibration set 
is to be used.