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PlaneIrradianceCovariance
MATLAB
D = PlaneIrradianceCovariance(alpha,d,Atm,wvl)
Description

Computes the irradiance covariance for a plane wave given turbulence multiplier alpha, point spacings d, atmospheric modeling data in Atm, and wavelength in wvl. In this calculation, the light propagates from the target to the platform, which is consistent with calculations of PlaneRytov and PlaneR0. Uses the weak turbulence assumption.

Parameters
Parameters 
Description 
alpha [scalar] 
Turbulence strength multiplier. 
d [vector] 
Separation of the points in the aperture plane (m). 
Atm [struct] 
Atmospheric modeling structure from AtmStruct
wvl [scalar] 
Optical wavelength (m). 
Return Values
Return Values 
Description 
B [vector] 
Irradiance covariance value 
References

  • L. C. Andrews and R. L. Phillips, Laser Beam Propagation through Random Media, 2nd ed. Bellingham, Wash.: SPIE Press, 2005.

Examples

>> alpha = 1; 

>> wvl = 0.5e-6; 

>> G = SimpleGeom(0, 2e4, 0); 

>> Atm = AtmStruct(G, 100, 'Cn2', 'HV57'); 

>> d = linspace(0, 0.5, 30); 

>> B = PlaneIrradianceCovariance(alpha, d, Atm, wvl); 

  • Irradiance covariance value for turbulence multiplier of 1, wavelength 0f 500 nm, planar source at 20 km propagating straight down, pupil-plane separations d, and atmospheric model Atm.
 

See Also
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