| 摘要 |
A simple RF system tracks a missile, bullet or artillery round and determines the instantaneous attitude of the spinning projectile 10 while in flight. The system is particularly useful in command-guided weapons systems where line-of-sight is maintained from the launch platform 24 to the target. The system includes a first pair of linearly polarized transmit antennas 40a and 40b spaced apart on the projectile for transmitting a signal and a harmonic of that signal. A receiver 22 on the launch platform determines the roll angle 50 and either the yaw 54 or pitch 52 angle from the received signals 35. To determine the remaining angle, either the receiver samples the received signals ninety degrees out of phase or a second pair of transmit antennas 44a and 44b are mounted on the projectile, preferably ninety degrees from the first pair, for transmitting another pair of harmonic signals. |
