Shortly after Syncom 3, Intelsat I, aka Early Bird, was launched on April 6, 1965 and placed in orbit at 28 ° west longitude.

Jean-Baptiste Morin ( 1583 – 1656 ) did not believe that Frisius ' method for calculating longitude would work, remarking, " I do not know if the Devil will succeed in making a longitude timekeeper but it is folly for man to try.

The longitude and latitude I used here are not from their downtowns, but from their highway exchanges.

And I fed it these longitude and latitude to specify the location of the cities:

In the early 17th century, the term was used by England's James I to state that while he recognized the existence of Spanish authority in those regions of the Western Hemisphere where Spain exercised effective control, he refused to recognize Spanish claims to exclusive possession of all territory west of longitude 46 ° 37 ' W under the Treaty of Tordesillas.

But when longitude at sea is lost, it cannot be found again by any watch .” However, if such a clock were built and set at noon in London at the start of a voyage, it would subsequently always tell you how far from noon it was in London at that second, regardless of where you had traveled.

In this case, approximate latitude and longitude ( 41. 2, − 072. 7 ) were looked up in a gazetteer and the UTM ( grid ) zone was found to be 18 using a Web-based converter.

He measured the ecliptic longitude of the star Spica during lunar eclipses and found that it was about 6 ° west of the autumnal equinox.

By comparing his own measurements with those of Timocharis of Alexandria ( a contemporary of Euclid who worked with Aristillus early in the 3rd century BC ), he found that Spica's longitude had decreased by about 2 ° in about 150 years.

A location for Antaeus somewhere beyond the Maghreb might be quite flexible in longitude: when the Roman commander Quintus Sertorius crossed from Hispania to North Africa, he was told by the residents of Tingis ( Tangier ), far to the west of Libya, that the gigantic remains of Antaeus would be found within a certain tumulus ; digging it open, his men found giant bones ; closing the site, Sertorius made propitiatory offerings and " helped to magnify the tomb's reputation ".

Nautiluses are only found in the Indo-Pacific, from 30 ° N to 30 ° S latitude and 90 ° to 175 ° E longitude.

A month later in the Musgrave Ranges a fine running river was found and named the Ferdinand and by 3 October 1873 the party was approaching longitude 128 East.

Hopkinton is found at 41. 461 N latitude and 71. 778 W longitude.

Although from 1714 to 1828 the British government did indeed sponsor a £ 20, 000 prize for finding a solution to the longitude problem, exactly why the connection was made to squaring the circle is not clear ; especially since two non-geometric methods ( the astronomical method of lunar distances and the mechanical chronometer ) had been found by the late 1760s.

Another representation of similar formulas, but using n-vector instead of latitude / longitude to describe the positions, is found by means of 3D vector algebra, i. e. utilizing the dot product, cross product, or a combination:

dependence on longitude has been found, nor is there any evidence of a dependence on auroral

* The westernmost and easternmost points of the world, based on the normal practice of using longitude, can be found anywhere along the 180th meridian in Siberia ( including Wrangel Island ), Antarctica, or the three islands of Fiji through which the 180th meridian passes ( Vanua Levu's eastern peninsula, the middle of Taveuni, and the western part of Rabi.

Vigan can be found 120 23 ’ 15 ’’ east longitude and 17 34 ’ 30 ’’ north latitude.

The southern extremity lies in Nongam-myeon, at < nowiki > 36 ° 41 ' 40 </ nowiki > N. The easternmost edge of the city can also be found in Dongno-myeon, at < nowiki > 128 ° 22 ' 42 </ nowiki > E longitude.

Mean longitude is the longitude at which an orbiting body could be found if its orbit were circular, and free of perturbations, and if its inclination were zero.

In celestial mechanics true longitude is the longitude at which an orbiting body could actually be found if its inclination were zero.

On 21 April a tree marked with an L was found in latitude 24 degrees 35 minutes and longitude 146 degrees 6 minutes.

He found these to be sufficiently accurate to determine the moon's position to 5 ", and consequently the longitude at sea to about half a degree.

Radville can be found at latitude 49 ° 27 ' 40. 83 " N, longitude 104 ° 17 ' 45. 17 " at an elevation of 2060 ft ( ref: Google Earth )

The municipality can be found in the map at 12 ° N latitude and 124 ° E longitude.

The area is approximately between latitude 6 ° 30 and 8 ° 40 north and longitude 6 ° 30 and 7 ° 40 east and covers an area of about 13, 665 square kilometers ( Oguagha P. A 1981 ) The Igala population is estimated at two million, they can also be found in Delta, Anambra and Edo States of Nigeria.

An alternative representation uses degrees and minutes, where parts of a minute are expressed in decimal notation with a fraction, thus: 23 ° 27. 500 ′ E. Degrees may also be expressed as a decimal fraction: 23. 45833 ° E. For calculations, the angular measure may be converted to radians, so longitude may also be expressed in this manner as a signed fraction of π ( pi ), or an unsigned fraction of 2π.

A point on the Equator that passes directly in front of this observer later in time has a higher planetographic longitude than a point that did so earlier in time.

At the North Pole all directions point south ; all lines of longitude converge there, so its longitude can be defined as any degree value.

) He agreed ( Geographia 1. 4 ) that longitude was best determined by simultaneous observation of lunar eclipses, yet he was so out of touch with the scientists of his day that he knew of no such data more recent than 500 years before ( Arbela eclipse ).

At this time the king also created the position of Astronomer Royal ( initially filled by John Flamsteed ), to serve as the director of the observatory and to " apply himself with the most exact care and diligence to the rectifying of the tables of the motions of the heavens, and the places of the fixed stars, so as to find out the so much desired longitude of places for the perfecting of the art of navigation.

As, however, the known means of measuring longitude were so inexact that the line of demarcation could not in practice be determined ( see J. de Andrade Corvo in Journal das Ciências Matemáticas, xxxi. 147-176, Lisbon, 1881 ), the treaty was subject to very diverse interpretations.

Geostationary satellites ( e. g., television satellites ) are over the equator at a specific point on Earth, so their position related to Earth is expressed in longitude degrees only.

It corresponds to the current amount of the nutation in ( ecliptic ) longitude () and to the current obliquity () of the ecliptic, so that.

Precession causes the stars to change their longitude slightly each year, so the sidereal year is longer than the tropical year.

To be useful, it was necessary to find the exact location ( latitude and longitude ) of the ' station ' where a gravity measurement was taken, so pendulum measurements became part of surveying.

These corrections will include a term that involves the observer's longitude, so both his latitude and longitude affect the final result.

On the spring and fall equinoxes ( around March and September 21 ), there is no tilt of the Earth with respect to the Sun so the terminator line is parallel with the axis of the Earth and with the lines of longitude.

An inex also is close to an integer number of days ( 10, 571. 95 ) so solar eclipses on average take place at about the same geographical longitude at successive events, although variations of the moon's revolutionary speed at different points of the eclipse mask this relation.

This is in contrast to the better known saros cycle, which has a period of about 6, 585 days, so successive solar eclipses tend to take place about 120 ° in longitude apart on the globe ( although at the same node and hence at about the same geographical latitude ).

The card is then moved along the string, positioned so the lower edge is even with the horizon, and the upper edge is occluding a target star, typically Polaris because its angle to the horizon does not change with longitude or time.

The conventional longitude of perihelion ϖ is defined relative to the vernal equinox, so for the elliptical orbit:

FitzRoy continued his voyage, sailing on to the Galapagos, Tahiti, New Zealand, Australia and South Africa, then detouring to Bahia in Brazil so that he could carry out an additional check to ensure the accuracy of his longitude measurements before returning to England.

The known means of measuring longitude were so inexact that the line of demarcation could not in practice be determined, subjecting the treaty to diverse interpretations.

If the coordinates are chosen so that the great circle is an equator ( latitude φ = 0 ), the conditional density for a longitude λ defined on the interval is

The twelve sector division of the ecliptic constitutes astrology's primary frame of reference when considering the positions of celestial bodies, from a geocentric point of view, so that we may find, for instance, the Sun in 23º Aries ( 23º longitude ), the Moon in 7º Scorpio ( 217º longitude ), or Jupiter in 29º Pisces ( 359º longitude ).