Bae Systems, Inc.

Selex Galileo Limited

Robert David Cooper

Dale Martin Gould

Alexis Mark Cooper

A transmitter of a platform is arranged to generate a transmission pulse, which is transmitted to a receiver of another platform and is also arranged to couple its transmission pulse to a digital receiver associated with its platform via an attenuator and a coupler. Another platform performs a similar task. Each digital receiver determines the time separation between its transmission pulse and a received pulse from the other platform. The determined time separation information is shared with the other platform, and each digital receiver then determines a time offset between the time at its platform and the other platform.

Time synchronization

An interferometer arrangement includes an antenna array that receives radiation from a plane wave emitted by a transmitter, the radiation being incident on the array at an angle (&#x3b8;). The array includes a plurality of antennas that provide output signals to a switching unit. The switching unit selects pairs of signals and passes them to a processor for processing. The processor is configured to produce an output signal that unambiguously indicates the value of the angle (&#x3b8;).

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Hatfield, United Kingdom

Robert David Cooper