Engineering topics
Publications and source records attributed to Allen, W. K..
This particular application was to vertical geodesy by tide gauge and tiltmeter on a small desert island in the British Virgin Islands. The performance of the LANDSAT system under potentially marginal circumstances was found to be excellent.
Frequency of carrier received by aircraft is measured and compared with reference to indicate magnitude of Doppler shift. One Doppler frequency range is selected and indicated by digital signal. Difference between frequency is offset of apparent carrier frequency transmitted by aircraft.
A system and method are disclosed for position locating, deriving centralized air traffic control data, and communicating via voice and digital signals between a multiplicity of remote aircraft, including supersonic transports, and a central station. Such communication takes place through a synchronous satellite relay station. Side tone ranging patterns, as well as the digital and voice signals, are modulated on a carrier transmitted from the central station and received on all of the supersonic transports. Each aircraft communicates with the ground stations via a different frequency multiplexed spectrum. Supersonic transport position is derived from a computer at the central station and supplied to a local air traffic controller. Position is determined in response to variable phase information imposed on the side tones at the aircrafts. Common to all of the side tone techniques is Doppler compensation for the supersonic transport velocity.
Traffic control system for supersonic transports using synchronous satellite for data relay between vehicles and ground station
Synchronizing apparatus for multi-access satellite time division multiplex system
Time Division Multiple Access /TDMA/ system for satellite communication with ground station system
Doppler compensation for maintaining signal synchronization of time division multiple access
Experiment to demonstrate multiple access technique in Position Location and Aircraft Communication Equipment studies using ATS-F satellite for air traffic control
Position location and communication equipment for two-way voice and signal data communication between aircraft and ground control facilities, using geosynchronous satellite transponders
Serrodyne traveling wave tube reentrant amplifier for synchronous communication satellites operating at microwave frequencies
Circuit with a sawtooth-modulated traveling-wave tube, which acts as a frequency converter and as an amplifier, simplifies microwave transmission. Lower power losses and reduced size and weight are also realized in this circuit.
Traveling wave tube development for serrodyne re-entrant amplifier
Wideband direct conversion communications satellite transponder
Direct microwave to microwave satellite transponders for reception, amplification and retransmission of information bearing rf signals between ground terminals