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  Encyclopedia of Keywords > Tour Operators > Travel > Exploration > Navigation > Longitude   Michael Charnine

Keywords and Sections
LONGITUDES
HARRISON
LATITUDE
CHRONOMETER
LONGITUDE VALUES
LUNAR DISTANCE
CALLED MERIDIANS
LONGITUDE PRIZE
BOARD OF LONGITUDE
DEGREES
GREENWICH
DETERMINING LONGITUDE
WEST
MEASURING LONGITUDE
HEMISPHERE
LONGITUDE PROBLEM
EACH DEGREE
DETERMINE LONGITUDE
CONSTANT LONGITUDE
ACCURATELY
FINDING LONGITUDE
ANGLE BETWEEN
VOYAGE
PRECISELY
MERIDIAN
Review of Short Phrases and Links

    This Review contains major "Longitude"- related terms, short phrases and links grouped together in the form of Encyclopedia article.

Definitions

  1. Longitude: The distance east or west of the prime meridian (measured in degrees). (Web site)
  2. Longitude is the second part of the ICBM address, latitude being the first. (Web site)
  3. Longitude is the east-west geographic coordinate measurement most commonly utilized in cartography and global navigation. (Web site)
  4. Longitude is the angular distance east or west from the north-south line that passes through Greenwich, England, to a particular location. (Web site)
  5. Longitude - The distance in degrees east or west of the meridian at Greenwich, England. (Web site)

Longitudes

  1. Determining longitude, the angular distance east or west of an arbitrary meridian, required the ability to keep time.
  2. Longitude is given as an angular measurement ranging from 0-- at the Prime Meridian to +180-- eastward and ---180-- westward.
  3. Longitude, sometimes denoted λ, describes the location of a place on Earth east or west of a north-south line called the Prime Meridian.
  4. Longitude is given in an angular measurement ranging from 0- at the Prime Meridian to plus or minus 180-.
  5. UT and you observe the sun time where you are to be noon, your longitude is exactly in 15-- W. (Web site)

Harrison

  1. So the British Parliament offered a substantial monetary prize to whoever could invent a device to determine exact longitude at sea. (Web site)
  2. Instead, it was a country clockmaker named John Harrison who would invent a clock that could survive wild seas and be used to calculate longitude accurately. (Web site)
  3. In Longitude, author Dava Sobel tells Harrison's story with vigor and insight. (Web site)
  4. I was blown away by the story of John Harrison, a Yorkshireman who uncovered the secret of calculating longitude.
  5. The "Longitude board" (which had offered a cash bonus to anyone who could devise a method in which time at sea could be kept) admired this prototype.

Latitude

  1. The geographic coordinate system is a latitude and longitude coordinate system.
  2. A geographical coordinate system is a system that uses latitude and longitude to describe points on the spherical surface of the globe. (Web site)
  3. To specify a position on the surface of Earth we use a system of coordinates that consists of two angles: latitude and longitude. (Web site)

Chronometer

  1. Before good chronometers were available, longitude measurements were based on the transit of the moon, or the positions of the moons of Jupiter.
  2. Even with all these modern methods of determining longitude, a marine chronometer and sextant are normally carried as a backup.

Longitude Values

  1. In other words, the same point on the earth---s surface can be described by different latitude and longitude values depending on the reference datum.
  2. Latitude and longitude values can be based on several different geodetic systems or datums, the most common being the WGS 84 used by all GPS equipment.
  3. Lines of longitude run perpendicular to the equator and converge at the poles. (Web site)
  4. Lines of longitude appear curved and vertical in this projection, but are actually halves of great circles. (Web site)

Lunar Distance

  1. This means of finding Longitude was known as the 'Lunar Distance Method'.
  2. At the time of the trial, another method for measuring longitude was ready for testing: the Method of Lunar Distances. (Web site)
  3. Huygens ran trials using both a pendulum and a spiral balance spring clock as methods of determining longitude. (Web site)

Called Meridians

  1. Lines joining points of the same longitude are called meridians.
  2. Longitude: Great circles that pass through both the north and south poles, also called meridians. (Web site)

Longitude Prize

  1. A body known as the Board of Longitude was set up to administer and judge the longitude prize.
  2. Dava Sobel's Longitude (Walker, 1995) brought Harrison to the attention of many adults, but The Longitude Prize may need a push to find a young audience. (Web site)

Board of Longitude

  1. The Board of Longitude, however, refused to recognise the results of this trial, so John and William petitioned Parliament.
  2. It was a remarkable achievement but it would be some time before the Board of Longitude was sufficiently satisfied to award Harrison the prize.
  3. The Board of Longitude, however, implied that the watch was a fluke and would not be satisfied unless others of the same kind could be made and tested.

Degrees

  1. LL2UTM requires the latitude and longitude in decimal degrees and returns the UTM Northing and Easting and the zone information.
  2. Each of these swaths is called a UTM zone and is six degrees of longitude wide. (Web site)

Greenwich

  1. In 1884, the International Meridian Conference adopted the Greenwich meridian as the universal prime meridian or zero point of longitude.
  2. In this way he was able to determine the position of the ship relative to the Greenwich meridian whose longitude was zero degrees exactly.
  3. The local hour angle is then added to the Greenwich hour angle to obtain the longitude where the position line passes through the assumed latitude. (Web site)
  4. D Howse, Greenwich time and the discovery of the longitude (Oxford, 1980). (Web site)

Determining Longitude

  1. The history of longitude is a record of the effort, by navigators and scientists over several centuries, to discover a means of determining longitude.
  2. In eighteenth century Europe, although scientists had long wrestled with the problem, sailors had no method of determining their longitude.
  3. Finding an adequate solution to determining longitude was of paramount importance. (Web site)

West

  1. The difference of longitude is determined knowing that the sun moves to the west at 15 degrees per hour.
  2. The longitude positions on WGS84 agree with those on the older North American Datum 1927 at roughly 85-- longitude west, in the east-central United States. (Web site)

Measuring Longitude

  1. John Harrison was the man who solved the problem of measuring longitude.
  2. That incident in the general context of British maritime endeavours led to the establishment of a prize for finding a method of measuring longitude.
  3. The Académie Royale des Sciences had solved the problem of the longitude for places on land. (Web site)

Hemisphere

  1. As a reminder, longitude values in the western hemisphere should be entered as negative.
  2. The following figure shows an equatorial stereographic projection with the hemisphere centered on the equator at longitude -105 degrees.

Longitude Problem

  1. The measurement of longitude was a problem that came into sharp focus as people began making transoceanic voyages. (Web site)
  2. The longitude problem took centuries to solve.
  3. The longitude problem was eventually solved by a working class joiner from Lincolnshire with little formal education.

Each Degree

  1. Each degree of longitude is further sub-divided into 60 minutes, each of which divided into 60 seconds.
  2. Each degree of latitude and longitude is subdivided into 60 equal parts called minutes and each minute is divided into 60 equal parts called seconds.

Determine Longitude

  1. The navigator can then determine longitude without a chronometer. (Web site)
  2. Halley also hoped that careful observations of magnetic deviations could provide a determination of longitude.
  3. He advocated a refinement of the Greek method of lunar eclipses to determine longitude. (Web site)
  4. Longitude by Chronometer, known by mariners as "Long by Chron", is an astronomical navigation method of calculating an observer's position on earth.

Constant Longitude

  1. A line of constant longitude is a meridian, and half of a great circle.
  2. The antipodal meridian of Greenwich is both 180--W and 180--E. Lines of constant longitude are called meridians.

Accurately

  1. If one can accurately measure the angle to Polaris, a similar measurement to a star near the eastern or western horizons will provide the longitude.
  2. The discovery of how to measure longitude accurately was among the important discoveries of the 1600s and 1700s.
  3. In order to accurately measure longitude, one must record the precise time of a sextant sighting (down to the second, if possible).
  4. A longitude is thus specified as 23° 27′ 30" E. For high accuracy, the seconds are specified with a decimal fraction. (Web site)
  5. Subsequent precise positioning systems, satellite laser ranging, VLBI and GPS, have based their longitude systems on that established by Doppler. (Web site)

Finding Longitude

  1. Gemma Frisius, in 1530, proposed a methods of finding the longitude using a clock. (Web site)
  2. DAVA SOBEL VO: Newton really prejudiced the Board by saying in no uncertain terms that no clock would ever succeed in finding the longitude. (Web site)

Angle Between

  1. Astronomic longitude is the angle between the plane of the meridian at Greenwich (Prime Meridian) and the astronomic meridian of the point. (Web site)
  2. It is defined as the angle between the plane of longitude fixed by the Vernal Equinox and the plane of longitude of the star. (Web site)

Voyage

  1. This genius was John Harrison who eventually received the Longitude Prize.
  2. This was not the transatlantic voyage demanded by the Board of Longitude, but the Board was impressed enough to grant Harrison --500 for further development. (Web site)
  3. It is not known for certain whether Harrison knew of this success, but Cook's voyage proved beyond doubt that longitude could be measured from a watch.
  4. Harrison, a village carpenter who designed and made clocks in his spare time, heard of the prize and began working on a seagoing clock to find out longitude. (Web site)

Precisely

  1. From the mid 19th century, telegraph signalling more precisely synchronized star observations to significantly improve longitude measurement accuracy.
  2. More precisely, one degree of longitude = (111.320 + 0.373sin----)cos-- km, where -- is latitude).

Meridian

  1. Unlike latitude, which has the equator as a natural starting position, there is no natural starting position for longitude.
  2. The circles of longitude, the meridians, meet at the geographical poles, with the west-east width of a second being dependent on the latitude.
  3. Meridians of longitude and parallels of latitude together form a grid by which any position on the earth's surface can be specified. (Web site)
  4. This grid system evolved into lines of latitude and longitude. (Web site)
  5. Longitude and Latitude The equator is an imaginary circle equidistant from the poles of the earth.

Categories

  1. Tour Operators > Travel > Exploration > Navigation
  2. Encyclopedia of Keywords > Time > Clocks
  3. Travel > Exploration > Navigation > Maps
  4. Encyclopedia of Keywords > Information > Knowledge
  5. Encyclopedia of Keywords > Society > Culture > Names
  6. Books about "Longitude" in Amazon.com

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  Short phrases about "Longitude"
  Originally created: March 17, 2008.
  Links checked: January 15, 2013.
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