GeneralAtmosphere models optical propagation through atmospheric turbulence. The atmosphere is modeled using multiple "phase screens", typically 5-20, distributed along the propagation path. Each phase screen represents the cumulative optical path differences for a slab of atmosphere, and in between phase screens we perform vacuum propagations, using a two-step FFT propagator. The details of the path model (number and placement of screens, turbulence strengths, inner scale, etc.) are specified by "atmosphere specification" (an object of type AcsAtmSpec). Atmosphere specifications can be created using TurbTool, and for certain common cases (e.g. uniform turbulence, or scaled Clear1) we have also provided a more convenient function call interface. The dimensions of each phase screen dimensions are controlled by a user-defined bounding rectangle for the region of interest at each end of the propagation path. If the specified bounds should be exceeded, each screen will be "scrolled" as necessary. Unlike AtmoPath, GeneralAtmosphere does not include PropagationControllers, at least one of which is required somewhere along each propagation path, so the user must put them in himself.

Parameters
atmSpec	AcsAtmSpec	Atmosphere specification
randomSeed	int	Seed for phasescreen generation	-1234567
regionPlatform	RectangularRegion	Region of interest at 'platform' end of path
regionTarget	RectangularRegion	Region of interest at 'target' end of path
dxy	float	Phase screen mesh spacing (m)
locFlag	int	Low order correction flag	0
Inputs
incomingIncident	WaveTrain	Light incident in 'incoming' direction	WaveTrain()
outgoingIncident	WaveTrain	Light incident in 'outgoing' direction	WaveTrain()
Outputs
incomingTransmitted	WaveTrain	Light transmitted in 'incoming' direction
outgoingTransmitted	WaveTrain	Light transmitted in 'outgoing' direction
Subsystems
Last Saved: Fri Feb 01 11:32:33 MST 2008 by TVE version 2007B