Communications: directive radio wave systems and devices (e.g. – With particular circuit – Display
Patent
1992-05-06
1994-08-02
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Display
342109, G01S 1300
Patent
active
053349857
ABSTRACT:
A method of displaying and determining the velocity of radar returns of frequency modulated continuous wave radars including the steps of determining a velocity for each radar return from a detected beat frequency associated with received radar returns, and displaying (for successive radar dwells) one or more major plots indicating range, azimuth and velocity of any radar returns. Each major plot is characterized by a velocity axis with a maximum and a minimum display velocity. The major plots are composed of minor plots indicating range, azimuth and velocity of any radar return and are characterized by a velocity axis that extends between zero velocity and the magnitude of greatest possible velocity corresponding to the range of the detected beat frequencies. Between successive radar dwells, radar returns on one side of the said zero velocity remain substantially in the same display position whereas associated radar returns displayed on the other side of the zero velocity do not remain substantially in the same position. Furthermore, classification of radar returns is assisted by displaying the radar returns on a display, displaying predicted radar return positions of a radar return on the display where the prediction of the position of the radar returns is in accordance with radar return azimuth from an antenna and estimates of the heights of the E and F layers.
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Headrick et al., "Over-the horizon Radar in the HF Band", Proceedings of the IEEE, vol. 62, No. 6, Jun., 1974, pp. 664-673.
Colegrove Samuel B.
Tucker Stephen P.
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