Radar echo discriminating device
AssigneeThomson-CSF
InventorMichel Residois
Life of this patent
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Abstract
A radar echo discriminating device for separating in the video signal of a pulse-type meteorological radar the rain echoes from the echoes due to the ground comprises fluctuation calculating means for subtracting the amplitude of the incident video signal corresponding to a given pulse emitted by the radar from the amplitude of a stored video signal corresponding to a pulse previously emitted by the radar, whereby the signal obtained after this processing represents only the rain echoes, whereas the ground echoes are attenuated.
Claims9
A radar echo descriminating device for use with pulse type meteorological radar and for discriminating between the echoes generated by rain and those echoes generated by the ground comprising:
- (a) fluctuation calculating means for receiving a wideband radar echo signal and for substracting an amplitude of said signal from an amplitude of a previously received radar signal and providing an output difference signal;
- (b) a compensating device connected for receiving said difference signal and amplifying said difference signal with a gain which compensates for said ground echo and the rain echo, and providing a compensated amplified difference signal;
- and
- (c) adding means having an input means to receive the wideband radar echo signal and the compensated amplified difference signal and for adding said signals, whereby a signal is provided at an output of said adding means which represents said rain echoes.
Dependencies are inferred from the claim text.