Why Meteor trails leave a brief column of ionization that behaves like a short-lived ionized reflector, and its electron density is only high enough to reflect signals up to roughly 150 MHz. The sweet spot runs from about 28 MHz through 148 MHz, which covers 10, 6 and 2 meters, with 6 meters generally considered the best meteor scatter band. Below that range normal ionospheric propagation and higher noise levels mask the short pings; above it the trails are too weakly ionized to return a usable signal.