罗兰—C系统定时简介
摘要(Abstract)：
<正> “罗兰”(LORAN)一词是远程导航(Long Range Navigation)英文字头的缩写,是第二次世界大战时开始发展的一种脉冲式双曲线定位系统。目前已有A、B、C、D四种类型。罗兰—B因周期识别困难已停止发展。罗兰—A系统,从1943年即开始装备,它工作在1.75～1.95MHz频段上,其地波可达700浬,天波达1400浬,主要用于海上航线,这种系统实际上只能算是中程导航系统。罗兰—C系统是一种低频脉冲相位双曲线远程导航系统,由罗兰—A发展而来。1952年开始试验它的前身西塔克(CYTA
关键词(KeyWords)：
基金项目(Foundation):
作者(Author):
Email:
DOI:
参考文献(References)：
- [1] USNO, "Time of Coincidence (null) ephemeris for Loran C chains", Time Service Announcement Ser. 9(USNO, Washington, DC 20390)
- [2] USNO, "Daily relative phase Values," Time Service Announcement Series 4(issued weekly and distributed on basis of need).
- [3] Johler, J.R, "Propagation of the low freguency radio signal," Proc, IRE, 50, No,4, pp.404-427 (April 1962) .
- [4] Johler, J.R, and Berry, L, A, "Loran-D phase Corrections over inhomogeneous irregular terrain," ESSA Tech. Rept. IER 59 ITSA 56, 70 pages (USGPO, November 1967) .
- [5] Wieder, B, "Use of Loran-C over land," Proc 25th Ann. symp.on Freguency control (U.S.Army Electronics Command. Ft. Monmounth, NJ. 07703, April 26-28 1971) , pp171-178． (NTIS, AD746211, 1971) .
- [6] Potts, C.E, and Wieder, B, "Precise time and freguency dissemination wia the Loran-C.system, "Proc.IEEE, 60, No.5 pp. 530-539 (May 1972)
- [7] Pakos, P.E, "Use of the Loran-C system for time and freguency dissemination,"Frequency Technology,7,No.7, PP.13-18 (July 1969) .
- [8] Shapiro, L.D, "Loran-C timing", Freguency, 8, No.2, PP.32-37(March-April 1965) .
- [9] Stone., C.S, "Loran-C skywave timing experiment," Austron Tech, Note 168-1 9pages(Austron, Inc, Austin, TX 78753,1968) 。
- [10] Doherty, R.H. "Experimental observations and theoretical calculations leading to a model of the lower ionosphere," Proc,Intern, Conf. on the Ionosp,(Imperial College, London, England, July 2-6, 1962) , PP,428-434 (Inst. of phys, and Phys. Soc, London, England, July 1963) .
- [11] Mazur, W. E, Jr, "operational considerations, for the Use of Loran-C skywaves for time synchronization," Goddard Space Flight Center Tech.Rep.X-573-71-148, 52 pages (NTIS, N71-24880, April 1971) .