This is often experienced when an emergency vehicle drives past with its siren blaring. Our interactive map allows you to see the local & national weather Garmin’s Fantom™ radar is available in 4' and 6' array sizes, both rated at a 72 nm range (but given the curvature of the Earth, the effective distance that an objected can be detected is much shorter). Since FMCW constantly builds up radar return energy (vs. a single “main bang” transmitted by a pulse radar), this system provides target detection superior to pulse radars while transmitting at far lower energy levels. The difference between the currently transmitted and received frequencies, coupled with the known rate of frequency increase, is how these radars precisely calculate a “time of flight” and target distance. The term RADAR is an acronym made up of the words: RAdio (Aim)° (Aim) Detecting And Ranging. Also, there’s no more waiting for warmup time. This method of generating several kilowatts of pulsed energy has to be coupled with a relatively wide-bandwidth receiver. This provides a more complete picture of targets in the atmosphere, allowing forecasters to differentiate between rain, snow/melting snow, and even hail.