always nice to see old technology stage a comeback and this time it is happening around the coasts of Europe, with nine radio stations often replace the GPS satellite system low. eLoran radio system based on stronger than the satellite signals and Jammable least based on the Loran system has already been used for ship navigation by the British and the U.S. Navy for over 50 years. But despite his age, technology has proved remarkably resilient against harmful interference. Tests carried out by the General Lighthouse Authorities of the United Kingdom and Ireland, radio jammer 1.5W was able to defeat the GPS signals within a radius of 30 kilometers. However, to do the same thing with the Loran system, you'll need a 40-foot tower -. And around 25 kilowatts of juice to power

The rationale Loran and GPS are virtually the same, with devices that measure the time it takes a signal to travel between a transmitter and a receiver. Loran requires three simple, with locations then calculated by "trilateration". More input signal is equal to a reading position more secure with the system database with accuracy the location of the initial public offering of approximately 100 meters. However, the update eLoran signal (currently shown only on the east coast of the United Kingdom, around Dover) which tapers down to less than 10 meters. GPS backup will be gradually extended throughout the British coast.

Filed under: GPS, Transportation