Search results
Results from the WOW.Com Content Network
Shushi-Wan Omega Transmitter (station H) situated near Shushi-Wan on Tsushima Island at used as its antenna a 389-metre tall tubular steel mast, insulated against ground. This mast, which was built in 1973 and which was the tallest structure in Japan (and perhaps the tallest tubular steel mast ever built) was dismantled in 1998 by crane.
Naval Radio Transmitter Facility LaMoure (NRTF LaMoure) is a United States Navy installation located about 3 km west of LaMoure, North Dakota. The site uses a former OMEGA Navigation System station as a VLF transmitter for communications with the US submarine fleet. Commander Blake Wayne Van Leer lead the construction and opening of the site. [1]
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Much like the antenna masts used for the U.S. Omega navigational system, the masts of Alpha must be very tall, for technical reasons. Unfortunately, no data are available for their height. Some transmitters are being disabled as of January 2014. Several remain on the air as of November 2017.
A linear response function describes the input-output relationship of a signal transducer, such as a radio turning electromagnetic waves into music or a neuron turning synaptic input into a response.
This requires a transducer with an input port in the electrical domain and an output port in the mechanical domain. This might be represented simplistically by a SISO transfer function, but for similar reasons to those already stated, a more accurate representation is achieved with a two-input, two-output MIMO transfer matrix.
However, many modulation schemes make this simple approach impractical because most signal power is devoted to modulation—where the information is present—and not to the carrier frequency. Reducing the carrier power results in greater transmitter efficiency. Different methods must be employed to recover the carrier in these conditions.
Unlike the Delrac system, Dectra was essentially the normal Decca Navigator system with the modification of several existing transmitter sites. [7] These were located at the East Newfoundland and Scottish chains, which were equipped with larger antennas and high-power transmitters, broadcasting 20 times as much energy as normal chain stations.