The basic mechanics of a Hf_radar system
is the analysis of a backscattered radio wave. The CODAR sytem works very much like a
radio station in that it emits a radio signal. While a radio
station does not monitor the signal that is scattered back to the station,
a CODAR site uses this backscattered radio wave to calculate
If the ocean were completely flat, no signals would be backscattered. Since the ocean is not
flat, it scatters the radio signal in many different directions.
In order to to amplify the protion of the scattered signal that is directed back to the
reciever antenea, the CODAR system utilizes the principles of "Bragg Scattering".
Since the ocean surface scatters a signal in many different directions,
some menchanism must be used to maximize the signal directed back to a CODAR reciever. Resonant
Bragg Scattering basically amplifies the scattered signal directed toward the reciever using
resonant theory. Resonance will only occur for certain signal wavelengths:
Resonant Bragg Scattering