ScreenR0

MATLAB

r0s = ScreenR0(alpha,lambda,Geom,Atm,[Nscreens])

Description

Computes the coherence diameter (Fried parameter) for each phase screen given turbulence assumptions, propagation geometry, and wavelength. Returns NaN if propagation path intersects earth surface.

Parameters

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 structure 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. May be a structure from AtmStruct or turbulence profile to be used.
Nscreens [scalar]	(Optional) Number of phase screens. Required if Atm is a turbulence profile string or Atm is not a discrete structure

Return Values

Return Values	Description
r0s [vector]	Coherence diameter for each phase screen (m)

Examples

r0s = ScreenR0(alpha,lambda,Atm)
r0s = ScreenR0(alpha,lambda,Geom,Atm)
- Geom and Atm must have same values for hp, ht, and rd.
r0s = ScreenR0(alpha,lambda,Geom,Cn2Model,Nscreen)
r0s = ScreenR0(alpha,lambda,hp,ht,rd,Cn2Model,Nscreen)