急求帮忙翻译英文文章,等著要用,不要在线翻译的,要有语法的,谢谢大家支持一下了!!万分感谢!!!
推荐回答(4个)
2. To strengthen international cooperation, enhances strong points and avoid weaknesses, and realize the great-leap-forward development
China's development of the cause of the navigation to of the world advanced level, and must strengthen international cooperation in China, speed up the pace of development of satellite navigation system. According to domestic demand, tracking international advanced theory and technology, make full analysis of the international success experience, especially not perfect experience and lessons, enhances strong points and avoid weaknesses, from higher level and more reliable starting point to, with China's national conditions, and realize the great-leap-forward development, avoid overall copy foreign technology. Efforts to improve our country civilian global positioning system technology advanced and Chinese characteristics, to improve the international status, and explore international market to create a good environment of science.
3. First regional and global coverage after be covered
Our satellite navigation system can consider to meet our country and surrounding areas for navigation and positioning demand. China's geographical coverage is for 65 degrees latitude direction span, centre for longitude 110 degrees longitude, the focus of the regional coverage range is 0 to 55 degrees north latitude, longitude 55 degrees to 180 degrees in the area, the requirement to complete the high accuracy on the navigation and positioning services. The constellation of regional must be designed to make it easier to expand to a global constellation, at present in China, satellite navigation system of regional constellation design scheme is usually two kinds: 1) X MEO + Y GEO. According to mark Walker, because its constellation design rules and unity of the good symmetry, and on the earth and a single compound cover, has the very high efficiency. As the increase of the system of GEO, also can be used as a GPS, GLONASS, GALILEO system enhancement parts. Regional design phase X = 3, Y = 9, satellite evenly distributed in three nearly round on orbit, dip Angle for 55 degrees, this design can ensure that China's regional most of the time continuous high precision positioning. Facing the global coverage, X = 4, Y = 24, at this time the sign of the design can reach global coverage, and can satisfy the requirements of all-weather precise positioning; 2) X IGSO + Y GEO. IGSO satellites have good coverage area and expansibility, and GEO satellite combined with a stable regional satellite navigation system. The early 3 x GEO + 3 IGSO layout can achieve good effect, the regional coverage through the expansion of the late gradually, the 6 x GEO + 18 IGSO constellation namely can achieve the purpose of global coverage.
4. Taking dual-use, promote, and related industry development and the progress of science and technology
Make full use of the existing technical conditions and infrastructure, both civilian and military needs; In building a global positioning system at the same time, full consideration involves the infrastructure and support of new and high technology of system for the future development of national economy in China and the information industry, space technology, aerospace engineering, earth science and new military system construction of support and promote role, promote the development of relative industries and the progress of science and technology.
5. System and user smooth transition and development
Navigation satellite system for space satellite number, ground systems complex, large investment and construction and operation cycle is long, the number of users, and big, wide range. The system planning system both must consider the current interest, and to consider the development of the system. At various stages of navigation service, the system will have certain compatibility, to ensure the system and the user the smooth transition and development.
In short, China's satellite navigation should base on the development of the cause of the situation of our country, seize all opportunities and challenges, and actively participate in international cooperation, learn from foreign advanced technology and successful experience, in order to achieve our country satellite navigation cause rapid development purposes.
你这个也忒长了,一般这种没有免费的翻译吧?真的是帮不了你。
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