Abstract: A GPS utilizing redundant GPS receivers having position and time mark outputs connected directly to a processing block so that the time marks from both GPS receivers are received by the processing block and, in the event a first of the GPS receivers output becomes unusable and the system uses a second of the redundant GPS receivers while periodically checking the first for reusability, no time will be lost in the validation of the new channel.

Abstract: The present invention is a system that is used on board an aircraft that receives data, examines the data, and directs the data to appropriate memory devices for future use. A plurality of receivers are coupled to a serial data bus for selectively receiving a sequence of data messages on the data bus. Each of the receivers includes a data register for storing one of the sequential flow of data messages. In turn the receiver provides a data ready signal so that a sequencer can selectively read the data messages from the receiver and either store them in one of a plurality of receivers, or discard the information.