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基于Matlab读取标准RINEX格式的GPS星历数据，采用Matlab直接读取Rinex文件张妮,等基于 Matlab读取标准 RINEX格式的GPS星历数据navdata(i). day str2num(line(10: 12));Le Edit yie seb finds Helpnavdata(i). hour=str2num (line(13: 15));navdata(i). minute str2num(line(16: 18))navdata (i).second str2num (line(19: 22));navdata(i). af0= str2num(line(23: 41))2:s10122-0041.4e012]【5.917e012]t30e95a-012navdata(i). afl str2num (line(42: 60));4.480-00navdata(i). af2 str2num (line(61: 79));4.600T+00619.8348←[6.419e007line fgetl(fid); %o second linem…2107007]navdata(i). aode str2num(line(4: 22))205-00【--007[7.2643c0090.9161【0.922】navdata().crs str2num(line(23: 41))navdata (i).dn= str2num(line(42: 60))图3读取星历数据结果navdata(i) Anomaly str2num (line(61: 79))Fig 3 Reading result of ephemeris dat4)关闭文件 status= fclose(fid)。骤,利用 Matlab矩阵的计算优势,很方便地计算不同时刻卫22星历数据的读取星的坐标,此外,还可方便查看卫星导航表层信息,判断导航星历数据的读取采用结构体数组显示的相关命令读取,数据的质量。若要获取某个卫星的相关参数可输入如示例命令:>>navdata(1)。获取结果如图2所示,为1号卫星参数读取结果3结论利用 Matlab以矩阵为单位进行计算的优势对 RINEX文件进行读取,较其他语言简单易行,结果精确,程序可移植性好,便于后续数据处理,同时还可利用 Matlab的仿真功能,实现卫星动态变化的实时模拟afl:1.47T9e-012参考文献:[1]陈东银,刘立龙,陈雷.GPS导航定位技术中面向对象读取 RINEX格式数据!测绘与空间地理信,2009(6):41-43.chen DorInCHen Lei. An ohmethod of reading rineX formatdat in GPS navigation tech-图21号卫星参数读取结果nology [J]. Geomatics and Spatial Information TechnologyFig. 2 Reading result of parameter of satliete NO.2009(6):41-43也可利用 Matlab元包数组,将数据存放并显示出来,具|2 I Gurtner W. RINEX: The receiver independent exchange for体实现代码如下mat: Version 2.10[M] Canada: Astronomical Institute UniverFN=fieldnamesnavdata)sity of Berne, 2002size=size(FN)3]孟广祥,郭标明.CPS接收机(OEM)二进制文件向 RINEXnavdata year;文件的转换[,测绘工程,2009(10:18-21.nav data=cell(oh+1);MENG Guang-xiang. Guo Biao-ming. The transformationsIzefrom GPS receiver (OEM) binary data to RINEX file[J]. Enfor i= 2: noph +1gineering of Surveyying and Mapping, 2009(10): 18-21onavcell=char(navdata year)[4]陈桂珍,戴建军.GPS-OEM原始数据向 RINEX格式转换nav_data(n, 1= char(FN(n));的方法[测绘技术装备,2006(4):26-27nav_data n, i= navdata(i-1).(char(FN(n)))CHENG Gui-zhen, DAI Jian-jun. The transformation fromGPS-OEM orignal data to RINEX Format[J]. Surveying techendnical equipment, 2006(4): 26-27读取结果如图3所示。5]张志涌.精通 Matlab6.5[M]北京:北京航空航天大学出版采用 Matlab软件读 RINEX导航文件,可以将文件所有社,2004的数据用矩阵保存,数据的显示精度不仅不会影响计算精6 Chapman Stephen J. Matlab Programming for engineers [M度,而且可以随时修改,并可根据卫星坐标的计算公式和步北京:科学出版社,200325基于Ma1ab读取标准RINX格式的GPS星历数据旧万据WANFANG DATA文献链接作者张妮,王标标, ZHANG NI, WANG Biao-biao作者单位张妮, ZHANG Ni(西安工业大学北方信息工程学院,陕西,西安,710025),王标标, WANG Biaobiao(中国人民解放军96275部队,河南洛阳,471003)刊名:电子设计工程sTc英文刊名ELECTRONIC DESIGN ENGINEERING年,卷(期):2010,18(8参考文献(6条)1. Chapman Stephen J Matlab Programming for engineers 20032.张志涌精通 Matlab6.520043.陈桂珍;戴建军 GPS-OEM原始数据向 RINEX格式转换的方法[期刊论文]测绘技术装备2006(044.孟广祥;郭标明GPS接收机(OEM二进制文件向 RINEX文件的转换2009(10)5. Gurtner W RINEX: The receiver independent exchange format: Version 2.10 2002陈东银;刘立龙;陈雷GPS导航定位技术中面向对象读取 RINEX格式数据2009(06)本文链接http://d.g.wanfangdata.comcn/periodiCaldzsjgc201008007.aspx

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二维元胞自动机 基于二维元胞自动机的交通流模拟分析44http://xbbjb.swu.cn38St(i,j)=F[S(i,j),S,(i-1,j),S,(i+1,j),S,(i,j-1),S,(i,j+1)](1)BMI(1)BMIT=4t=341843.2/(N×N)NXN(AJAVAT=232×32,64×64,128128,256×256,512×512,T=4128×128MATLAB01100002000∷;酸(a)暂念的渐近状态(b)暂心的阻塞状态3128×128128×128C1994-2013CHinaAcademicJOurnalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net643平均速度与密度关系图1.0平均速度曲线L32×320L=64x=128×1280808=256×2560.7512x512060.6053.330H040.30.20.2w0.10152253035404500.2040.6081.012141.61820密度/时间步10T=25128×1280.34.3BMLT0.80.60.4502eBMI02515密度/6128×128BMI(T-2T-4)BMIBMI[1 NAGEL K, SCHRECKENBERG M. A Cellular Automaton Model for Freeway Traffic [J]. Journal of Physique, 19922:221-2292 HAM O, MIDDLETON AA, LEVINE D. Self-Organization and a Dynamical Transition in Traffic Flow Models [J]Physical Review E, 1992(10):6124-6127L3 FUKUI M. ISHIBASHI Y. Traffic Flow in 1D Cellular Automaton Model Including Cars Moving with High Speed LJJ996,65(6):1868-1872005,54(10):4621-4626,2010,10(2):122-128C1994-2013cHinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net46http://xbbjb.swu.cn38On Simulation and analysis on Traffic Flow Based onTwo-Dimensional Cellular automationMEI Hong, CHENG WeiZHANG Yun-sheng, YU Peng-cheng1. Faculty of Continuing Education, Kunming University of Science and Technology, Kunming 650051, China;2. Faculty of Transportation Engineering, Kunming University of Science and Technology, Kunming 65005 1, ChinaFaculty of Information Engineering and Automation, Kunming University cf Science and Technology, Kunming 650051. China4. Computer Center, Kunming University of Science and Technology, Kunming 650051. ChinaAbstract: BML model is a two-dimensional cellular automata model, which is especially used to simulateand analy ze the traffic system. We use Java language to implement this model. With this model, the re-ationship between the average velocity and the average density has been found by computer simulationThe phase transition and self organization have also been faund. And at last, the bml model improved intraffic light cycle changes for exploring more valuable to the research and applicationKey words: two-dimensional cellular automation; traffic flow; BML modelC1994-2013CHinaAcademicJOurnalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net

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