... 赤道视差 equatorial parallax 赤道系统 equatorial system 赤道仪 equatorial instrument ...
基于6个网页-相关网页
全球定位系统在赤道附近性能最好。
孙来燕说，中国还将完成12颗北斗导航卫星的系统，其中一些将会绕着赤道运行。计划中的导航以及定位系统的卫星将超过30颗。
China will develop 12 Beidou or North Dipper satellites, some destined for geostationary orbit. It plans a navigation and positioning system of more than 30 satellites, Sun said.
本文研究了一类三次系统无穷远点的中心条件与赤道极限环分枝问题。
Studied in this paper are center conditions and bifurcation of limit cycles from the equator for a class of cubic polynomial system.
应用推荐