초록 ▼

A system for measuring the roll angle of a rotating projectile. The system includes a transmit system mounted on the projectile. The transmit system has a linearly polarized transmit antenna system, a first transmitter coupled to the transmit antenna system for transmitting a first transmit signal a

A system for measuring the roll angle of a rotating projectile. The system includes a transmit system mounted on the projectile. The transmit system has a linearly polarized transmit antenna system, a first transmitter coupled to the transmit antenna system for transmitting a first transmit signal at a first frequency, and a second transmitter coupled to the transmit antenna system for transmitting a second transmit signal at a second frequency. The first frequency is different from the second frequency, and the first and second transmit signals are in phase coherency. The system further includes a receiver system located remotely from the projectile. The receiver system includes a linearly polarized receive antenna system for receiving the first transmit signal and the second transmit signal. A first receiver section is provided for receiving and downconverting the first transmit signal to provide a first receiver signal. A second receiver section is provided for receiving and downconverting the second transmit signal to provide a second receiver signal. The first and second receiver signals are in phase coherency. A roll angle processor is responsive to the receiver system for calculating the roll angle.

대표청구항 ▼

[ What is claimed is:] [1.] A system for tracking the roll angle of a rotating projectile, comprising:a transmit system mounted on the projectile, the system including a linearly polarized transmit antenna system, a first transmitter coupled to the transmit antenna system for transmitting a first tr

[ What is claimed is:] [1.] A system for tracking the roll angle of a rotating projectile, comprising:a transmit system mounted on the projectile, the system including a linearly polarized transmit antenna system, a first transmitter coupled to the transmit antenna system for transmitting a first transmit signal at a first frequency, a second transmitter coupled to the transmit antenna system for transmitting a second transmit signal at a second frequency, wherein said first frequency is different from said second frequency, and said first transmit signal and said second transmit signal are in phase coherency;a receiver system located remotely from the projectile, the receiver system including a linearly polarized receive antenna system for receiving said first transmit signal and said second transmit signal, a first receiver section for receiving and downconverting said first transmit signal to provide a first receiver signal, and a second receiver section for receiving and downconverting said second transmit signal to provide a second receiver signal, wherein said first and second receiver signals are in phase coherency; anda roll angle processor responsive to said receiver system for calculating said roll angle.