Abstract: Method and apparatus for providing security for a vehicle and for cargo transported on the vehicle. A location determination (LD) system determines vehicle location. A cargo unit carries a transceiver (or transmitter) that transmits a selected signal, either sua sponte or in response to receipt of a polling signal. The selected signal, if received by a receiver on the vehicle, is examined as to signal intensity, signal coding and/or time of receipt. If the received signal violates a selected condition, vehicle location is compared with an approved cargo destination. If the vehicle is not near a cargo destination, or if no selected signal is received at the receiver, an alarm signal is transmitted, which may include the vehicle location and/or the violated condition. If the LD system does not receive adequate LD signals to determine vehicle location, vehicle location coordinates are compared with a coordinate range for a signal obscuring region (SOR).

Abstract: The mobile station designed for the mobile differential dynamic surveying and targeting is disclosed. The mobile station includes a targeting device for acquiring the coordinates and the image of the designated remote target object. The mobile station further includes a SATPS based differential position-angular determination system capable of determining the coordinates of the mobile station and the angular coordinates of the normal vector to the mobile station. The mobile station receives the differential corrections from the differential station and transmits the data and image information to the third station.