Milestone-Proposal:LORAN: Difference between revisions
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{{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=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. Since it operates in the 1,750 to 1,950 kc frequency range, both ground waves and sky waves can be used to to provide coverage over an extensive area with few stations. An important advantage of loran is that a ship can 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 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. Since it operates in the 1,750 to 1,950 kc frequency range, both ground waves and sky waves can be used to to provide coverage over an extensive area with few stations. An important advantage of loran is that a ship can 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. | |||
The following paragraphs tell the story of Loran's beginning, its first leaders, location where the work was performed, the installation of the first | The following paragraphs tell the story of Loran's beginning, its first leaders, location where the work was performed, the installation of the first | ||
Engineering is not a solo activity. When a grande long-lived engineered system like LORAN, .. this nomination milestone gives credit to those persons that worked on the so-called Project 3 or C of the Radiation Laboratory of MIT during 1941 to c1946. This group of individuals did not work in the Rad Lab building, having nothing to do with microwave or radar. These individuals work in the Hood Building and other building in Boston and Cambridge. The USCG had a permanent office working on this project. One person in particular that deserves mention is Coast Guard Lt. Cmdr. L.M. Harding who provided supervision and direction for the Pacific Loran ... | Engineering is not a solo activity. When a grande long-lived engineered system like LORAN, .. this nomination milestone gives credit to those persons that worked on the so-called Project 3 or C of the Radiation Laboratory of MIT during 1941 to c1946. This group of individuals did not work in the Rad Lab building, having nothing to do with microwave or radar. These individuals work in the Hood Building and other building in Boston and Cambridge. The USCG had a permanent office working on this project. One person in particular that deserves mention is Coast Guard Lt. Cmdr. L.M. Harding who provided supervision and direction for the Pacific Loran ... | ||
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REFERENCES | REFERENCES | ||
JA Pierce, "An Introduction to Loran", IEEE AES Magazine 1990 (attached) | JA Pierce, "An Introduction to Loran", IEEE AES Magazine 1990 (attached) | ||
Bowditch, American Practical Navigator.U.S. Navy Hydrographic Office, 1958 pp. 333 - 343 | |||
http://www.loran-history.info/ | http://www.loran-history.info/ | ||
http://www.uscg.mil/history/stations/loran_volume_1_index.asp | http://www.uscg.mil/history/stations/loran_volume_1_index.asp | ||
Revision as of 14:12, 9 December 2010
This Proposal has not been submitted and may only be edited by the original author.
Pierce Loran.pdf
