Abstract: A display system is disclosed for displaying air traffic symbology from a plurality of different types of air traffic surveillance systems on a single monitor. A display device includes a processor for generating display symbology from TCAS, SKE and ADS-B information, and a monitor for displaying the generated symbology in a uniform format.

Abstract: A formation collision avoidance system includes a Traffic Alert and Collision Avoidance System (TCAS) having a passive mode and an active mode. The passive mode enables several members of an aircraft formation to fly without actively interrogating using TCAS while only one or few formation members are actively interrogating. Formation members in passive mode maintain awareness of current air and ground traffic conditions using networked surveillance information provided over a communications link between formation members in active mode and formation members in passive mode. The networked surveillance information includes positional and intent information of current air/ground traffic obtained from ADS-B broadcasts and replies to the actively interrogating members of the formation. The communications link utilizes Station Keeping Equipment (SKE) already existing on certain aircraft.

Abstract: A formation collision avoidance system includes a Traffic Alert and Collision Avoidance System (TCAS) having a passive mode and an active mode. The passive mode enables several members of an aircraft formation to fly without actively interrogating using TCAS while only one or few formation members are actively interrogating. Formation members in passive mode maintain awareness of current air and ground traffic conditions using networked surveillance information provided over a communications link between formation members in active mode and formation members in passive mode. The networked surveillance information includes positional and intent information of current air/ground traffic obtained from ADS-B broadcasts and replies to the actively interrogating members of the formation. The communications link utilizes Station Keeping Equipment (SKE) already existing on certain aircraft.

Abstract: A display system is disclosed for displaying air traffic symbology from a plurality of different types of air traffic surveillance systems on a single monitor. A display device includes a processor for generating display symbology from TCAS, SKE and ADS-B information, and a monitor for displaying the generated symbology in a uniform format.

Abstract: A high power radio frequency(RF) precision step attenuator includes a trim attenuator, a multi-step attenuator and a calibration/control circuit. The control circuit includes a memory for storing attenuator specific calibration data. The calibration data incorporates attenuator characteristics which are used by the control circuit to adjust the attenuator and compensate for manufacturing variances, temperature variations, and the like.

Abstract: A high power radio frequency (RF) precision step attenuator includes a trim attenuator, a multi-step attenuator and a calibration/control circuit. The control circuit includes a memory for storing attenuator specific calibration data. The calibration data incorporates attenuator characteristics which are used by the control circuit to adjust the attenuator and compensate for manufacturing variances, temperature variations, and the like.

Abstract: A system to alter the voltage supplied to the linear regulator of a pulsed transmitter in accordance with the temperature of the regulator, the minimum voltage required for a transmission and the specific aircraft installation requirements so as to reduce problems of heat dissipation in the regulator.

Abstract: Airplanes have transponders which receive and transmit signals to communicate information regarding the flight of the airplane. A transponder testing apparatus is integrated into the transponder and verifies that the transponders are operating in accordance to Federal Aviation Regulations.

Abstract: A multi-layered printed wiring board for high frequency application includes a first board of polytetrafluoroethylene (PTFE) having a metallic sheet on each side. The first side is etched to form high frequency circuity using micro-strip technology and the second side being a metallic sheet forming the ground plane. Laminated to the ground plane of the first board is a fiberglass board of thickness, A. Further, laminated to the fiberglass board is a second board of fiberglass having a thickness, A. The second board also has metallic sheets on both side, the side being laminated to the fiberglass board being etched to form strips, prior to being laminated, forming signal and transmission lines utilizing strip-line technology. Vias are formed to interconnect predetermined metallic layers.