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ScreenData
WT = ScreenData(C) WT = ScreenData([lambda],G,Atm)
Returns a structure of computed screen data useful for input to a WaveTrain simulation. Velocity decomposition is done in the target "parallel" (P) and the target "transverse" (T) directions, both of which are transverse to the propagation direction.
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Parameters |
Description |
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C [struct] |
Engagement case structure from CaseStruct or a comma-separated list of ([lambda],G,Atm) |
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lambda [scalar] |
(Optional) Wavelength for which to compute the screen r0 values (m). Defaults to 1 micron. |
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G [struct] |
Geometry structure as from GeomStruct |
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Atm [struct] |
A discrete atmospheric structure from AtmStruct with models for Cn2, Wind, Abs, Scat, and Temp. Any models not present will be set to zero. |
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Return Values |
Description |
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ScrData [struct] |
Structure of computed screen data. |
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ScrData.platformAlt [scalar] |
Platform altitude (m) |
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ScrData.targetAlt [scalar] |
Target altitude (m) |
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ScrData.groundRange [scalar] |
Ground range along Earth's surface (m) |
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ScrData.slantRange [scalar] |
Slant range from platform to target (m) |
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ScrData.platformVp [scalar] |
Component of platform velocity in the P direction (m/s) |
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ScrData.platformVt [scalar] |
Component of platform velocity in the T direction (m/s) |
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ScrData.targetVp [scalar] |
Component of target velocity in the P direction (m/s) |
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ScrData.targetVt [scalar] |
Component of target velocity in the T direction (always 0) |
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ScrData.psPositions [vector] |
Phase screen locations (m) |
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ScrData.psThicknesses [vector] |
Phase screen slab thicknesses (m) |
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ScrData.Cn2 [vector] |
Cn2 values for the phase screens (${m}^{-2/3}$) |
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ScrData.IntegratedCn2 [vector] |
Integrated Cn2 values for each phase screen slab (${m}^{1/3}$) |
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ScrData.Abs [vector] |
Absorption coeff. for the phase screens (1/m) |
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ScrData.Scat [vector] |
Scattering coeff. for the phase screens (1/m) |
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ScrData.Temp [vector] |
Temperature for the phase screens (K) |
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ScrData.Lin [vector] |
(Optional) Turbulence inner scale values for the phase screens (m) |
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ScrData.Lout [vector] |
(Optional) Turbulence outer scale for the phase screens (m) |
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ScrData.r0Screens [vector] |
r0 values for the phase screens (m) |
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ScrData.wavelength4r0s [scalar] |
Wavelength at which r0Screens was computed (m) |
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ScrData.WindVelocityP [vector] |
Component of natural wind velocity in the P direction (m/s) |
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ScrData.WindVelocityT [vector] |
Component of natural wind velocity in the T direction (m/s) |
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ScrData.EffVelocityP [vector] |
Component of the total (natural and slew) wind in the P direction (m/s) |
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ScrData.EffVelocityT [vector] |
Component of the total (natural and slew) wind in the T direction (m/s) |
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Copyright (c) 2009. All rights reserved.
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Description