Method and apparatus for estimating trajectory

Details Method and apparatus for estimating trajectory Method and apparatus for estimating trajectory

1985-05-22

1988-06-14

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Plural radar

342424, G01S 1358

Patent

active

047515112

ABSTRACT:
A method and apparatus for estimating the trajectory of a projectile using two interferometric radar antennas each producing a group of interferometric antenna lobes forming intersecting solid angles, and being directed at an elevation angle so that the projectile passes through each interferometric antenna lobe. Each radar antenna transmits a different frequency of pulsed RF power and receives pulsed RF signals reflected from the projectile whenever the projectile passes through the antenna lobes of the radar antennas. Based on the received signals of respective radar antennas, the range and time information for the projectile passing through the antenna lobes of the respective radar antennas can be obtained. From this range and time information, the three-dimensional coordinates, speed and acceleration at the points in the antenna lobes through which the projectile passes can be obtained. From the 3-dimensional coordinates and the speed and acceleration of the projectile, the trajectory of the projectile can be estimated.

REFERENCES:
patent: 3295128 (1966-12-01), Canaday et al.
patent: 3982713 (1976-09-01), Martin
patent: 4546355 (1985-10-01), Boles
patent: 4549184 (1985-10-01), Boles et al.
patent: 4563686 (1986-01-01), Boles
M. Skolnik, Intro. to Radar Systems, pp. 165-167; (McGraw-Hill, 1980).
European Search Report EP 85 10 5275, Jan. 23, 1987.

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