Abstract: A method for receiving requested multicast data over a plurality of multicast communications channels includes the steps of determining a source communications channel for receiving requested multicast data; enabling the source communications channel; receiving the requested multicast data through the source communications channel; and, forwarding the requested multicast data to requesting processes. In the preferred embodiment, the source communications channel is overloaded with multicast data from a plurality of multicast data sources. In consequence, the method can further include both the steps of filtering from the received multicast data, unwanted multicast data; and, routing the filtered multicast data to requesting processes. In a preferred embodiment, the determining step can further include hashing an identifier corresponding to a multicast data source of the requested multicast data; and, identifying as the source communications channel, the hashed identifier.

Abstract: A satellite simulator to aid in the development and test of a spacecraft command and telemetry application for ground stations permits a satellite simulator to be implemented effectively and with less cost than has traditionally been possible with customized systems. From the spacecraft command and telemetry processing system, the present invention appears as a satellite that can provide a configurable telemetry stream and can accept configurable commands. The invention provides core satellite simulation capabilities required for ground station spacecraft command and telemetry processing systems such as OS/COMET or for large-scale simulation networks such as multi-service simulation systems. The present invention offers an inexpensive risk mitigation that relieves application developers of total dependency on the satellite simulation development schedule. Moreover, the present invention can be used to demonstrate the features of ground station application systems.

Abstract: A flight warning system comprises an outside temperature probe for sensing outside temperature, a gyroscope for sensing aircraft bank angle, a static transducer for sensing static pressure, and a dynamic pressure sensor for receiving total pressure from a pitot tube. A computer is responsive to the gyroscope, static transducer, outside temperature probe and dynamic pressure sensor calculates whether the aircraft is entering a stall condition by comparing the aircraft's bank angle with the stall bank angle. The computer can also calculate whether sufficient altitude exists for the aircraft to safely return to a field after a power failure. An output device can also be provided for indicating the existence of said sufficient altitude, and a stall indicator can be provided for indicating whether the aircraft is entering a stall condition. A method for determining the existence of a stall condition with the aircraft is also disclosed.

Abstract: A satellite simulator to aid in the development and test of a spacecraft command and telemetry application for ground stations permits a satellite simulator to be implemented effectively and with less cost than has traditionally been possible with customized systems. From the spacecraft command and telemetry processing system, the present invention appears as a satellite that can provide a configurable telemetry stream and can accept configurable commands. The invention provides core satellite simulation capabilities required for ground station spacecraft command and telemetry processing systems such as OS/COMET or for large-scale simulation networks such as multi-service simulation systems. The present invention offers an inexpensive risk mitigation that relieves application developers of total dependency on the satellite simulation development schedule. Moreover, the present invention can be used to demonstrate the features of ground station application systems.

Abstract: A method and system for generically tracking an entity in a specific domain. The system includes a generic application interface for receiving and processing tracking data regarding a tracked item. The generic application interface is configured for user modification so that the interface may be customized for a specific tracking requirement.A tracking engine is provided for abstracting the tracking data provided by the generic application interface to a set of generic object models. Each instantiated object comprising the generic object models encapsulates the tracking data pertaining to a tracked item. A tracking router is also provided for communicating at least one of the instantiated objects to a tracking station at a location for processing in accordance with an anticipated physical flow of the objects through a domain. As a result, instantiated object can be processed by the tracking engine independently of the specific tracking data contained therein.