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: http://www.iki.rssi.ru/magbase/REFMAN/GLOSSARY/Coordinates.html
Дата изменения: Unknown Дата индексирования: Fri Dec 21 22:06:57 2007 Кодировка: Поисковые слова: spring |
Carrington coordinates are heliographic and measured in latitude and longitude in that rotating frame. Carrington Time is the rotation and longitude of the point on the Sun that is at the sub-terrestrial point. The first Carrington rotation began at an arbitrary instant on Nov 9, 1853. Rotations are counted from that time with longitude decreasing from 360 to 0 during each rotation as the central meridian point rotates under the Earth.
The two systems were defined independently, but it's not totally coincidental that the rates are nearly the same. It's the Sun's influence on the Earth's magnetosphere through the solar wind that causes geomagnetic activity, after all.
1998:05:20_00h:00m:00s CT 1936:249 696711 BT 2250:10