Weather Signal Power (SIG threshold)

The SIG parameter provides an estimate of the weather signal-to-noise ratio in dB for thresholding.

The SIG calculation is different depending on whether the optional R₂ autocorrelation is computed.

SIG calculation
Autocorrelation	Equation	Description
`R₀`, `R₁`	$S I G = 10 \log [\frac{T_{0} - N}{N}] + C C O R$	Represents the SNR after the removal of clutter. The CCOR value is that described for `R₀`, `R₁` in Clutter correction (CCOR threshold).
`R₀`, `R₁`,`R₂`	$S I G = 10 \log [\frac{2 π S}{R_{0} - 2 π S}] + C C O R$	The SIG is computed based on the SNR. The signal power S is determined as described in Clutter correction (CCOR threshold).