Ship-based over-the-horizon radar

摘要

A ship-based over-the-horizon (OTH) radar system provides mobile, persistent, wide-area air and ship surveillance across large ocean expanses and in anti-access/area denial (A2AD) environments. A transmit ship may include a log-periodic antenna (LPA) array adapted for use on a ship and a receive ship may include a plurality of monopole or dipole whip antennas. The transmit/receive antenna is fronted by a ground screen, which can be sized taking into account the sea as a naturally reflective surface. The transmit/receive ship can include advanced software to compensate for ship movement and synthetic aperture radar (SAR) techniques can be employed to includes the effective size of the radar receiver aperture. A modular design, using standard commercial container ships and shipping containers, allows for rapid deployment/stowage of radar equipment. Related methods are also described.

主权项

1. A method for providing an over-the-horizon (OTH) radar system, the method comprising:
providing a receive ground screen comprising a reflective surface and adapted to form a generally continuous flat surface supported on a surface of a receive ship; providing a receive antenna adapted to be supported on the surface of a receive ship and configured to receive radar signals reflected off one or more objects within a selected target area and refracted off the Ionosphere; and providing a radar receiver to process the received radar signals to detect the one or more objects.