Level 2 Help for PHOTFIT2_REGNER_HAPKE_HG1

W_SOIL

Single-scattering albedo of the soil particles. It characterizes the efficiency of an average particle to scatter and absorb light. 
One of the classical Hapke parameter.


MIN_W_SOIL

This parameter gives the absolut lower limit of the single-scattering albedo of the soil particles. It characterizes the efficiency 
of an average particle to scatter and absorb light. 
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


MAX_W_SOIL

This parameter gives the absolut upper limit of the single-scattering albedo of the soil particles. It characterizes the efficiency 
of an average particle to scatter and absorb light. 
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


T_W_SOIL

This parameter gives temperatur for the single-scattering albedo of the soil 
particles. It characterizes the efficiency of an average particle to scatter 
and absorb light. 
This parameter gives the range over which random guesses can be expected to 
vary at first:
    W_SOIL_NEW = T_W_SOIL * tan( PI * ran_num + PI/2 ).
As the system cools the range will constrict gradually :
	T_W_SOIL_NEW_* = T_W_SOIL_OLD_* * scale, 
scale depends of NUMTEN.


H_SHOE

One of the classical Hapke parameter.
Parameter which characterizes the soil structure in the terms of porosity, particle-size distribution, and rate of compaction with depth (angular width of opposition surge due to shadowing). 


MIN_H_SHOE

This parameter gives the absolut lower limit of the parameter which characterizes the soil structure (angular width of the 
opposition surge due to shadowing). 
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


MAX_H_SHOE

This parameter gives the absolut upper limit of the parameter which characterizes the soil structure (angular width of the 
opposition surge due to shadowing). 
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


T_H_SHOE

This parameter gives temperatur for the parameter which characterizes the soil 
structure (angular width of the opposition surge due to shadowing). 
This parameter gives the range over which random guesses can be expected to 
vary at first:
    H_SHOE_NEW = T_H_SHOE * tan( PI * ran_num + PI/2 ).
As the system cools the range will constrict gradually :
	T_H_SHOE_NEW_* = T_H_SHOE_OLD_* * scale, 
scale depends of NUMTEN.


B_SHOE

One of the classical Hapke parameter. 
Opposition magnitude coefficient. The total amplitude of the opposition surge due to shadowing. It is the ratio of the light scattered from near the illuminated surface of the particle to the total amount of light scattered at zero phase : 
B_SHOE=S(0)/(W_SOIL*p(0))
with p(0) - soil phase function
S(0) - opposition surge amplitude term which characterizes the contribution of 
light scattered from near the front surface of individual particles at zero 
phase.
For a true, shadow-hiding opposition effect, 0<=B_SHOE<=1.
However, there are several other phenomena that may also cause a surge in brightness at small phase angles. These including the following:
1) The coherent backscatter or weak photon localisation due to multiply 
   scattered light.
2) An single-particle opposition effect caused by complex porous agglomerates 
   ( soil phase function )
3) Glory caused by sperical particles ( soil phase function )
4) Internal reflections of transparent particles ( soil phase function )
   These various phenomena may be large enough to increase the opposition surge 
   by more than a factor of 2. This possibility may be taken into account by 
   allowing B_SHOE to be greater than 1.
 


MIN_B_SHOE

This parameter gives the absolut lower limit of the parameter which characterizes the opposition magnitude coefficient.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


MAX_B_SHOE

This parameter gives the absolut upper limit of the parameter which characterizes theopposition magnitude coefficient.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.
 


T_B_SHOE

This parameter gives temperatur for the parameter which characterizes the 
opposition magnitude coefficient.
This parameter gives the range over which random guesses can be expected to 
vary at first:
    B_SHOE_NEW = T_B_SHOE * tan( PI * ran_num + PI/2 ).
As the system cools the range will constrict gradually :
	T_B_SHOE_NEW_* = T_B_SHOE_OLD_* * scale, 
scale depends of NUMTEN.
 


THETA

Average topographic slope angle of surface roughness at subresolution scale.
One of the classical Hapke parameter. 


MIN_THETA

This parameter gives the absolut lower limit of the average topographic slope angle of surface roughness at subresolution scale.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


MAX_THETA

This parameter gives the absolut upper limit of the average topographic slope angle of surface roughness at subresolution scale.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


T_THETA

This parameter gives temperatur for the average topographic slope angle of 
surface roughness at subresolution scale.
This parameter gives the range over which random guesses can be expected to 
vary at first:
    THETA_NEW = T_THETA * tan( PI * ran_num + PI/2 ).
As the system cools the range will constrict gradually :
	T_THETA_NEW_* = T_THETA_OLD_* * scale, 
scale depends of NUMTEN.


HG1_SOIL

Parameter of the first term of the Henyey-Greenstein soil particle 
phase function.
One of the classical Hapke parameter. 


MIN_HG1_SOIL

This parameter gives the absolut lower limit of the parameter of the first term of the Henyey-Greenstein soil particle 
phase function.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


MAX_HG1_SOIL

This parameter gives the absolut upper limit of the parameter of the first term of the Henyey-Greenstein soil particle 
phase function.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


T_HG1_SOIL

This parameter gives temperatur for the parameter of the first term of the 
Henyey-Greenstein soil particle phase function.
This parameter gives the range over which random guesses can be expected to 
vary at first:
    HG1_SOIL_NEW = T_HG1_SOIL * tan( PI * ran_num + PI/2 ).
As the system cools the range will constrict gradually :
	T_HG1_SOIL_NEW_* = T_HG1_SOIL_OLD_* * scale, 
scale depends of NUMTEN.


W_ATM

Single scattering albedo of the atmospheric aerosols.


MIN_W_ATM

This parameter gives the absolut lower limit of the single scattering albedo of 
the atmospheric aerosols.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


MAX_W_ATM

This parameter gives the absolut upper limit of the single scattering albedo of 
the atmospheric aerosols.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


T_W_ATM

This parameter gives temperatur for the single scattering albedo of the 
atmospheric aerosols.
This parameter gives the range over which random guesses can be expected to 
vary at first:
    W_ATM_NEW = T_W_ATM * tan( PI * ran_num + PI/2 ).
As the system cools the range will constrict gradually :
	T_W_ATM_NEW_* = T_W_ATM_OLD_* * scale, 
scale depends of NUMTEN.


TAU_ATM

Optical depth of the atmosphere.


MIN_TAU_ATM

This parameter gives the absolut lower limit of the optical depth of the 
atmosphere.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


MAX_TAU_ATM

This parameter gives the absolut upper limit of the optical depth of the 
atmosphere.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


T_TAU_ATM

This parameter gives temperatur for the optical depth of the atmosphere.
This parameter gives the range over which random guesses can be expected to 
vary at first:
    TAU_ATM_NEW = T_TAU_ATM * tan( PI * ran_num + PI/2 ).
As the system cools the range will constrict gradually :
	T_TAU_ATM_NEW_* = T_TAU_ATM_OLD_* * scale, 
scale depends of NUMTEN.


HG1_ATM

Parameter of the first term of the Henyey-Greenstein atmospheric phase function.


MIN_HG1_ATM

This parameter gives the absolut lower limit of the parameter of the first term 
of the Henyey-Greenstein atmospheric phase function.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


MAX_HG1_ATM

This parameter gives the absolut upper limit of the parameter of the first term 
of the Henyey-Greenstein atmospheric phase function.
If a sulution guess falls out-of-bonds then the attemp will be aborted and 
a new guess attempted.


T_HG1_ATM

This parameter gives temperatur for the parameter of the first term of the 
Henyey-Greenstein atmospheric phase function.
This parameter gives the range over which random guesses can be expected to 
vary at first:
    HG1_ATM_NEW = T_HG1_ATM * tan( PI * ran_num + PI/2 ).
As the system cools the range will constrict gradually :
	T_HG1_ATM_NEW_* = T_HG1_ATM_OLD_* * scale, 
scale depends of NUMTEN.