172221 ⎘
Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves; Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being pulses or equivalent modulations on carrier waves and the transit times being compared by measuring the difference in arrival time of a significant part of the modulations, e.g. LORAN systems Details of receivers cooperating therewith, e.g. determining positive zero crossing of third cycle in LORAN-C
LORAN TRANSMITTER, RECEIVER, SYSTEM AND METHOD OF OPERATING SAME
#2METHOD FOR SEPARATING LORAN SKY AND GROUND WAVES BASED ON LEVENBERG-MARQUART ALGORITHM
#3RECEPTION OF SIGNALS FOR RANGING, TIMING, AND DATA TRANSFER
#4Enhanced LORAN (eLORAN) system having multiple transmit frequencies
#5System and methods for a private eLoran service
#6Enhanced LORAN system generating correction factors based upon satellite-derived data and related methods
#7eLORAN receiver and antenna with ferromagnetic body and windings and related methods
#8Loran device with interference cancellation and interference canceller device with related methods
#9Long range navigation system having direct sequence spread spectrum (DSSS) RF signal
#10Enhanced LORAN (eLORAN) system having corrected additional secondary factor (ASF) data
#11Enhanced loran (eLORAN) system having divided non-station specific eLORAN data
#12eLORAN receiver with ferromagnetic body and related antennas and methods
#13System and methods for a private eLoran service
#14Method for passively locating a non-movable transmitter
#15USING LORAN FOR TERRESTRIAL TIME TRANSFER
#16Reduced Q low frequency antenna
#17Position signal receiver
#18SYSTEM AND METHOD FOR OPTIMAL TIME, POSITION AND HEADING SOLUTION THROUGH THE INTEGRATION OF INDEPENDENT POSITIONING SYSTEMS
#19Loran-based underground geolocation, navigation and communication system
#20Method of and apparatus for true north azimuth determination using the combination of crossed loop antenna and radio positioning system technologies
#21Method and system for demodulation of a differential Loran C signal
#22Method and system for deriving location information from utility lines
#23Method of and apparatus for eliminating quadrature-generated signals in magnetic cross-loop antennas