vpmanager.setpbairy

Description Information sufficient to create a portion of the Airy disk voltage pattern. The Airy disk pattern is formed by Fourier transforming a uniformly illuminated aperture and is given by

vp_p(i) = (areaRatio*2.0*j₁(x)/x - 2.0*j₁(x*lengthRatio)/(x*lengthRatio))/areaNorm,

(1.18)

where areaRatio is the dish area divided by the blockage area, lengthRatio is the dish diameter divided by the blockage diameter, and

x = $\displaystyle {\frac{i * maxrad * 7.016 * dishdiam/24.5m}{N_{samples} * 1.566 * 60}}$ .

(1.19)

Arguments

`telescope`	Which telescope in the MS will use this vp/pb?
	`Allowed:`	`String`
`othertelescope`	If telescope=="OTHER", specify name here
	`Allowed:`	`String`
`dopb`	Should we apply the vp/pb to this telescope's data?
	`Allowed:`	`Bool`
	`Default:`	`T`
`dishdiam`	Effective diameter of dish
	`Allowed:`	`Quantity`
	`Default:`	`25m`
`blockagediam`	Effective diameter of subreflector blockage
	`Allowed:`	`Quantity`
	`Default:`	`2.5m`
`maxrad`	Maximum radial extent of the vp/pb (scales with 1/freq)
	`Allowed:`	`Quantity`
	`Default:`	`0.8deg`
`reffreq`	Frequency at which maxrad is specified
	`Allowed:`	`Quantity`
	`Default:`	`1GHz`
`squintdir`	Offset of RR beam from pointing center, azel frame (scales with 1/freq)
	`Allowed:`	`Measure`
	`Default:`	`Measure`
`squintreffreq`	Frequency at which the squint is specified
	`Allowed:`	`Quantity`
	`Default:`	`1GHz`
`dosquint`	Enable the natural beam squint found in the common vp model
	`Allowed:`	`Bool`
	`Default:`	`F`
`paincrement`	Increment in Parallactic Angle for asymmetric (ie, squinted) vp application
	`Allowed:`	`Quantity`
	`Default:`	`360deg`
`usesymmetricbeam`	Not currently used
	`Allowed:`	`Bool`
	`Default:`	`F`

Returns itemcontainer

Next: vpmanager.setpbcospoly - Function Up: vpmanager - Tool Previous: vpmanager.setcannedpb - Function Contents Index

	`Package`	`synthesis`
	`Module`	`imager`
	`Tool`	`vpmanager`

vpmanager.setpbairy - Function