newsimulator.setnoise

Description Set various system parameters from which the thermal (ie, random additive) noise level will be calculated. The noise will vary with dish diameter, antenna efficiency, system temperature, opacity, sky temperature, etc. The noise will increase with the airmass if tau is greater than zero. The noise is calculated according to the Brown Equation (ie, R.L. Brown's calculation of MMA sensitivity, 3Oct95):

$\displaystyle \Delta$ S = $\displaystyle {\frac{4 \sqrt{2} [ T_{rx}e^{\tau A} + T_{atm} ( e^{\tau A} - \ep... ...}) + T_{cmb}] }{\epsilon_{q} \epsilon_{a} \pi D^2 \sqrt{\Delta \nu \Delta t }}}$

(1.37)

Arguments

`mode`	Mode of operation
	`Allowed:`	`String: 'table'\|'simplenoise'\|'calculate'`
	`Default:`	`'calculate'`
`table`	Name of noise table if not simplenoise or not calculated
	`Allowed:`	`String`
	`Default:`	`''`
`simplenoise`	Level of noise if not Table or not Calculated
	`Allowed:`	`Quantity`
	`Default:`	`'0.0Jy'`
`antefficiency`	antenna efficiency
	`Allowed:`	`Float`
	`Default:`	`0.8`
`correfficiency`	Correlation efficiency
	`Allowed:`	`Float`
	`Default:`	`0.85`
`spillefficiency`	Forward spillover efficiency
	`Allowed:`	`Float`
	`Default:`	`0.85`
`tau`	Atmospheric Opacity
	`Allowed:`	`Float`
	`Default:`	`0.0`
`trx`	Receiver temp (ie, all non-atmospheric Tsys contributions) [K]
	`Allowed:`	`Float`
	`Default:`	`50`
`tatmos`	Temperature of atmosphere [k]
	`Allowed:`	`Float`
	`Default:`	`250.0`
`tcmb`	Temperature of cosmic microwave background [K]
	`Allowed:`	`Float`
	`Default:`	`2.7`

Next: newsimulator.setpa - Function Up: newsimulator - Tool Previous: newsimulator.setleakage - Function Contents Index

	`Package`	`synthesis`
	`Module`	`newsimulator`
	`Tool`	`newsimulator`

newsimulator.setnoise - Function