SNR

SNR.
Signal-to-noise ratio
South American.
A standard model for computing earth data ...

SNR
Signal-to-noise ratio
SOLO
Your first totally unassisted flight that results in a controlled landing.

(SNR). The higher the SNR ratio the better the RADARs detection capability is. Since RADAR works through electromagnetic waves many things can affect the signal.

See also: Helicopter, Navigation, Speed, Slats, Air traffic