SAFESALB
Name
safesalb
Purpose (one Line Only)
Filter to enforce a valid range of single scattering albedo [0,1]
Description
This routine recasts an input value (or set of values) and upon return
the values are certain to be in the inclusive range of [0,1]. This
is done in following order and maps the infinite number range down
onto the finite range:
safesalb = |salb|
safesalb = safesalb mod 2.0
safesalb = 2.0 - safesalb where safesalb > 1.0
In the range "near" the original range this function basically implements
a mirror at 0 and 1. This is most useful for ameoba-like fitting routines
that don't know what to do with a finite range fitting variable.
Category
Function fitting
Calling Sequence
return = safesalb(salb)
Inputs
salb - input values to process (any rank allowed)
Optional Input Parameters
Keyword Input Parameters
Outputs
returns the single scattering albedo reduced to its principle range, it
is allowed to return to the same variable, ie., salb=safesalb(salb).
Keyword Output Parameters
Common Blocks
Side Effects
Restrictions
Procedure
Modification History
2009/02/01, Written by Marc W. Buie, Southwest Research Institute