Time: Difference between revisions
Jump to navigation
Jump to search
(added some info needs checking and internal links / related pages) |
(No difference)
|
Revision as of 12:13, 10 November 2010
What are GMT, UTC and Zulu?
GMT (Greenwich Meat Time) was introduced when the concepts of longitude and latitude cane to be used for sea navigation. It is the line of longitude - passing though Greenwich Great Britain that all times around the world were compared to. This longitude line is known as the Prime Meridian
UTC (Coordinated Universal Time) was introduced when the accuracy of clocks improved to the extent that variations in the rotation of the earth caused measurable errors in time calculations. UTC now replaces the GMT
Zulu the letter Z in the phonetic alphabet. The time designation used in aviation and defence.
Time in Amateur Radio
Various digital modes are very dependent on accurate time measurements