eLoran System is the latest in the long- standing and proven series of low-frequency, long-Range Navigation (LORAN) systems. eLoran is an independent, dissimilar, complement to Global Navigation Satellite System. It meets a set of world wide standards and operates wholly independently of GPS, GLONASS, Galileo, or any future GNSS. Each user’s eLoran receiver will be operable in all regions where an eLoran service is provided. eLoran receivers shall work automatically, with minimal user input. The core eLoran system comprises modernized control centre, transmitting statis and monitoring sites. eLoran transmissions are synchronized to an identifiable, publicly-certified, source of Co-ordinated Universal Time (UTC) by a method wholly independent of GNSS. This allows the eLoran Service Provider to operate a time scale that is synchronized with but operates independently of GNSS time scales. Synchronizing to a common time source will also allow receivers to employ a mixture of eLoran and satellite signals. The principal difference between eLoran and traditional Loran-C is the addition of a data channel in the transmitted signal. This conveys application-specific corrections, warnings, and signal integrity information to the user’s receiver. It is this data channel that allows eLoran to meet the very demanding requirements of landing aircraft using precision instruments approaches and bringing ships safely into harbour in low-visibility conditions. eLoran is also capable of providing the exceedingly precise time and frequency references needed by the telecommunications systems that carry voice and internet communications.
Application Service Providers –
(e.g. aviation, maritime, etc…) delivering application-specific data (e.g. differential Loran messages or early sky wave warnings) that may be communicated using the eLoran data channel. eLoran’s enhanced accuracy, availability, integrity meets the requirements for aviaton-precision instrument approaches, maritime harbour entrance and approach maneuvers, land-mobile vehicle navigation, and location-based services. It also allows absolute UTC time to be recovered with an accuracy of 50 nanoseconds as well as meeting the Stratum 1 frequency standard needed by telecommunication users.