Definition
The portion of a transmitted radio or radar signal that is reflected back toward the source by particles, surfaces, or atmospheric conditions in the signal's path.
Plain English
When a radio or radar signal hits something, part of it bounces straight back to where it came from. That returning portion is called backscatter.
Context Anchor
Seen in radar, weather radar, and remote-sensing discussions when explaining how radar returns are produced.
Derivation
From 'back' (return direction) plus 'scatter' (to spread in many directions). The combined word captures the idea that a signal striking many small targets is scattered in all directions, and the part scattered back toward the transmitter is the useful return.
Why Pilots Care
Stronger backscatter returns indicate heavier precipitation and help pilots assess storm intensity and avoid hazardous weather.
Analogy
It is like shining a flashlight into fog: some of the light spreads away, but some reflects back toward your eyes, making the fog visible.
Intuition Check
Backscatter is not a new signal sent by the target. It is the aircraft’s or radar station’s own transmitted energy returning after it hits something.
Example Sentence 1
Heavy precipitation produces strong backscatter, which is why thunderstorms show up so clearly on weather radar.
Example Sentence 2
Pilots use backscatter strength to estimate rainfall rates and turbulence potential.