Theta0 = SphericalTheta0(alpha,lambda,Geom,Atm)
Computes the spherical wave isoplanatic angle given turbulence assumptions, propagation geometry, and wavelength. Returns NaN if propagation path intersects earth surface.
Parameters 
Description 
alpha [vector] 
Multiplier on turbulence model 
lambda [scalar] 
Wavelength of laser (m) 
Geom [struct/list] 
Geometry parameters. Can be a structure from GeomStruct or a comma separated list of (...,hp,ht,rd)  not required if Atm is a struct from AtmStruct 
hp [scalar] 
Altitude of transmit/receive platform (m) 
ht [scalar] 
Altitude of target (m) 
rd [scalar] 
Downrange of target along spherical earth surface (m) 
Atm [struct/string] 
Atmospheric modeling parameters. Can be a structure from AtmStruct or a turbulence profile model to be used. 
Return Values 
Description 
Theta0 [vector] 
Spherical wave isoplanatic angle (rad) 
>> theta0 = SphericalTheta0(1.0,1.0e6,AtmStruct)
{'HufnagelValley',15,1e15})
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