Level 2 Help for PHOTTESTM_GENERAL

Filename of the photometric catalog file (IBIS2) of type "phocat".
The structure of the phocat file is desined in such a way that tiepoint files 
can be extended and containing all collumns of the old IBIS1 photometric 
catalog files. 
The program PHOTTEST used only one IMAGE_* group IMAGE_1 containing 
informations relates to the image. GENERAL_QLF containes informations relates 
to the object point (e.g. CLASS_IDentifier). 
There are 19 columns in this file. All are empty exept folowing columns:
	IMAGE_1 & IncidenceAngle
	IMAGE_1 & EmissionAngle	 
	IMAGE_1 & PhaseAngle
	IMAGE_1 & I/F 		= reflectance values as computed from the 
				  photometric function.
	IMAGE_1 & StandDev
	GENERAL_QLF & CLASS_ID  = Class identification

Photometric function :

	valid values :	LAMBERT, 
			MINNAERT, 
			IRVINE, 
			VEVERKA, 
			BURATTI1, 
			BURATTI2, 
			BURATTI3, 
			MOSHER, 
			LUMME_BOWEL_HG1, 
			HAPKE_81_LE2, 
			HAPKE_81_COOK, 
			HAPKE_86_HG1, 
			HAPKE_86_HG2, 
			HAPKE_86_LE2, 
			HAPKE_HG1_DOM, 
			REGNER_HAPKE_HG1, 
			ATMO_CORR_REGNER
NOTE: When returning to the highest level of the menu (i.e. the MDF-file) you 
will see that the second selection point has been changed according to your 
input of PHO_FUNC.
For more see pho_routines.com and PHOPDF.COM 

The class_id numerates the photometric functions. For using different fotometric functions or parameter sets.

Incidence angle in degree.
This parameter specifies the incidence angles for up to 100 points. If any of 
INC_ANG, EMIS_ANG, and PHAS_ANG are specified, then all three must be 
specified, and all with the same number of values.

Emission angle in degree.
This parameter specifies the incidence angles for up to 100 points. If any of 
INC_ANG, EMIS_ANG, and PHAS_ANG are specified, then all three must be 
specified, and all with the same number of values.

Phase angle in degree.
This parameter specifies the incidence angles for up to 100 points. If any of 
INC_ANG, EMIS_ANG, and PHAS_ANG are specified, then all three must be 
specified, and all with the same number of values.

Starting point for grid in degrees.
This parameter is only used if INC_ANG, IMI_ANG, and PHAS_ANG are not 
specified. It is used, togeter with parameter DELTA, to compute a grid of 
angles. This parameter specifies the starting values for the grid of: (Incidence, Emission, Azimuth) in that order. The Phase angle is computed for 
each point from the three given angles. 
The grid range for these angles is: 
	Incidence & Emission angles  : 0 -  90 degrees. 
	Azimuth 		     : 0 - 180 degrees.

Increment for grid in degrees.
This parameter is only used if INC_ANG, EMIS_ANG, and PHAS_ANG are not 
specified. It is used, together with parameter START, to compute a grid of 
angles. This parameter specifies the increment values for the grid of: 
(Incidence, Emission, Azimuth) in that order.
The grid range for these angles is: 
	Incidence & Emission angles  : 0 -  90 degrees. 
	Azimuth 		     : 0 - 180 degrees.

Simulated standard deviation.
If this quantity is non_zero, then the program will simulate experimental error 
by adding an absolute "error" to each computed reflectance. These errors will 
be random with a gaussian probability distribution with standard deviation = 
SIGMA. Since reflectances cannot exceeded 1.0, this is also assumed to be a 
maximum on SIGMA. To check that the simulated errors are reasonable, the 
program prints out the computed mean error and standard deviation for the 
errors added. The "STD.DEV" should be about equal to SIGMA, and the "MN.ERR" 
should be close to 0 (much smaller than SIGMA).

Arbitrary seed for SIGMA.
This is an arbitrary number used to start the random number generator for 
SIGMA. It is only used if SIGMA is not zero. The default can be used unless the 
user wants to ensure that the random numbers are different from a previous 
run. The value of this parameter should be a large, odd, negative integer.

Screen output of the data generated.
If this keyword is set to 'PRINT', a table will be printed to the screen.