5.1.2.0 sd.scantable.opacity

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sd.scantable.opacity - Function

5.1.2 Apply an opacity correction
Description

Apply an opacity correction. The data and Tsys are multiplied by the correction factor.

Correction includes an elevation dependence of the opacity. Actual correction factor is exp(τ * ZD), where ZD is the zenith-distance and τ is a value given as the tau argument. If a list of opacities is provided, it has to be of length nIF, nIF*nPol or 1 and in order of IF/POL, e.g. [opif0pol0, opif0pol1, opif1pol0 ...]. If tau is ‘None‘ the opacities are determined from a model.

If insitu is True, or insitu is None and sd.rcParams[’insitu’] is True, the method will not return the result, but apply operation on this scantable.

Arguments


Inputs
tau	A (list of) opacity
	allowed:	float, float array
	Default:	None
insitu	If False a new scantable is returned
	allowed:	bool
	Default:	None

Returns
scantable

Example

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