Milestone-Proposal:LORAN: Difference between revisions
From IEEE Milestones Wiki
(Article updated via HTTP request) |
(Article updated via HTTP request) |
||
| Line 1: | Line 1: | ||
{{ProposalEdit|a1=LORAN|a2a=Cambridge MA|a2b=Boston Section|a3=1940 to 1946|a4= | {{ProposalEdit|a1=LORAN|a2a=Cambridge MA|a2b=Boston Section|a3=1940 to 1946|a4=What is loran? Loran is a hyperbolic system of navigation by which difference in distance from two points on shore is determined by measurement of the time interval between reception of pulse- modulated synchronized signals from transmitters at the two points. The name loran is derived from long-range navigation. Both ground waves and sky waves can be used to provide coverage over an extensive area with few stations, depending on design frequencies. An important advantage of loran at the time of its development during WW2, was that a ship could use loran without breaking radio silence. Loran transmitting stations work in pairs. Synchronization is achieved by letting the signals of the master station, control those of the slave station. To help overcome the disadvantage of requiring two transmitting stations for a single family of hyperbolic lines of positions, loran forms a chain of stations, so that each station except the end ones operate with the station on either side to form an intersecting lattice of position lines. Loran can be used for air-borne navigation as well as by mariners. To find their way, loran navigators must have an radio receiver-indicator, a time piece, and a set of loran nautical charts or loran tables. | ||
Loran was used | |||
Loran consist of three components: 1. a chain of radio transmitters in operations 24/7 to create an electronic lattice or grid upon the surface of the earth. 2. a loran receiver-indicator in each ship or aircraft and 3. loran nautical and aeronautical charts or tables published by the US Navy Hydrographic Office. A simple explanation of how loran works can be found is section on loran as an Attachment named "American Practical Navigator" | Loran consist of three components: 1. a chain of radio transmitters in operations 24/7 to create an electronic lattice or grid upon the surface of the earth. 2. a loran receiver-indicator in each ship or aircraft and 3. loran nautical and aeronautical charts or tables published by the US Navy Hydrographic Office. A simple explanation of how loran works can be found is section on loran as an Attachment named "American Practical Navigator" | ||
INSERT OR REFER TO DOC.. | INSERT OR REFER TO DOC.. | ||
Each ship or bomber required a radio receiver- indicator, something like a electronic stopwatch but with a cathode ray tube, timing circuits, etc. The third system component was Loran charts or tables wasThen the navigator | Each ship or bomber required a radio receiver- indicator, something like a electronic stopwatch but with a cathode ray tube, timing circuits, etc. The third system component was Loran charts or tables wasThen the navigator | ||
shipboard navigators | shipboard navigators | ||
