Also, you say it's low-latitude, but then you give degrees west, which is a longitude measurement.

A party was sent ashore to make an observation of the first moon of Jupiter, by which they were able to improve their longitude measurements.

This significantly improved longitude measurement accuracy.

Before good chronometers were available, longitude measurements were based on the transit of the moon, or the positions of the moons of Jupiter.

The problem of longitude measurement had been at the heart of astronomical research for a century or more, and marine chronometers were steadily becoming more accurate.

To map the minefields, Mr. Willoughby said, the Halo Trust teams conducted topographical surveys using equipment that measured standard latitude and longitude measurements.

The reference longitude adopted by the English became known as the Prime Meridian and is now accepted by most nations as the starting point for all longitude measurements.

During 1843 and 1844, Struve participated in longitude measurements between Altona, Greenwich and Pulkovo, which were based on large displacement of chronometers over the Earth surface.

A world circumnavigation to make a hydrographic survey of the coast of Patagonia, Tierra del Fuego, Chile and Peru, and establish accurate longitude measurements.

The Italian astronomer Giovanni Domenico Cassini had pioneered the use of the eclipses of the Galilean moons for longitude measurements, and published tables predicting when eclipses would be visible from a given location.

These were storms that were located at low latitudes (between 0 and 20 degrees South) and the 320 West Longitude measurement applies specifically to the Sept. 2010 "arrow storm" as a way of being more specific about its location.

On 23 July they set off again longing to reach home, but FitzRoy wanted to ensure the accuracy of his longitude measurements and so took the ship across the Atlantic back to Bahia in Brazil to take check readings.

The Royal Observatory in Greenwich and the U.S. Coast Survey coordinated European and North American longitude measurement campaigns in the 1850s and 1860s, resulting in improved map accuracy and navigation safety.

The DriftBox can also be used as a performance meter, measuring 0-60, 0-100, 0-100-0, braking distances, quarter mile times and speeds, as well as lap times using a virtual start/finish line generated from the latitude/longitude measurements from the GPS.

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.

He used a theodolite to observe the sun or stars for latitude and longitude calculations.

His longitude calculations were not error-free, however.

His biographer, Brooke Hindle, guesses that Rittenhouse assisted with latitude or longitude calculations.

It could not easily be used to measure the angle between two objects, which was necessary for longitude calculations by the lunar distance method (though that technique was not used when the instrument was developed).