Marine chronometer

About: Marine chronometer is a research topic. Over the lifetime, 116 publications have been published within this topic receiving 633 citations.

Constraints on power law cosmology from cosmic chronometer, standard ruler, and standard candle data

Abstract: In this paper I compare the quality of the fit of a simple power law model of cosmic expansion to the standard $\Lambda$CDM model. I analyze a data set consisting of cosmic chronometer, standard ruler, and standard candle measurements, finding that the $\Lambda$CDM model provides a better fit to most combinations of these data than does the power law model

The Use of Chronometers to Determine Longitude on East India Company Voyages

Abstract: John Arnold in his Certificates and Circum-stances states that various East India Company captains used his chronometers. The earliest instance quoted is that of Captain Charles Mears on board HEIC...

Instrument determining geographical coordinates - has elements depicting space as well as earths sphere

Abstract: a simple instrument for the determination of latitude and longitude of a point on the earth's surface, consists of a number of parts which can be moved relatively to each other, of which at least one represents space and at least one the geographical globe. The angles of elevation of various marked heavenly bodies and marked spots on the earth's surface and the corresponding geographical latitude can be read off. By providing a set of discs the effect of passage of time, and hence the longitude can be found. All that is required besides the apparatus itself is a vertical angle measuring apparatus, a radio receiver for the time transmitter or a chronometer. The apparatus itself consists in principle of space table (A), large circle flag (B) and time angle disc (C).