lambda-tools

所属分类:matlab编程
开发工具:matlab
文件大小:348KB
下载次数:104
上传日期:2014-03-14 20:23:19
上 传 者费尔南多大托妞
说明:  用matlab程序编写,附带源码以及说明书,用于GPS定位技术方面整周模糊度固定的计算小工具
(Using matlab programming, with source code and instructions, GPS positioning technology integer ambiguity fixed for computing gadgets)

文件列表:
lambda解算工具 (0, 2014-03-14)
lambda解算工具\0 (1353, 2005-03-29)
lambda解算工具\Contents.m (1144, 2000-04-27)
lambda解算工具\_desktop.ini (9, 2006-09-21)
lambda解算工具\a (1623, 2004-08-29)
lambda解算工具\chistart.m (3704, 2000-04-27)
lambda解算工具\decorrel.m (3296, 2013-05-22)
lambda解算工具\decorrel.m.bak (3288, 2000-04-27)
lambda解算工具\geofree.mat (336, 2000-04-27)
lambda解算工具\lambda.pdf (366133, 2013-05-22)
lambda解算工具\lambda.ps (472394, 2000-04-27)
lambda解算工具\lambda1.m (7073, 2000-04-27)
lambda解算工具\lambda2.m (4389, 2000-04-27)
lambda解算工具\large.mat (1600, 2000-04-27)
lambda解算工具\ldemo.m (16113, 2000-04-27)
lambda解算工具\ldldecom.m (1201, 2013-05-22)
lambda解算工具\ldldecom.m.bak (1185, 2013-05-22)
lambda解算工具\lsearch.m (5374, 2000-04-27)
lambda解算工具\sixdim.mat (664, 2000-04-27)
lambda解算工具\small.mat (400, 2000-04-27)
lambda解算工具\trm1_5.99o (6913, 2002-01-13)
lambda解算工具\trm2_5.99o (6913, 2002-01-13)
lambda解算工具\trm_shrt.amb (437, 2002-01-13)
lambda解算工具\writemat.m (1400, 2000-04-27)

***************************************************** *** The LAMBDA-method: Matlab implementation V2.0 *** ***************************************************** Use and Liability ----------------- Use of the accompanying LAMBDA software is allowed, but no liability for the use of the software will be accepted by the authors or their employer, the Delft University of Technology. Giving proper credits to the authors is the only condition posed upon the use of the LAMBDA software. We ask you to refrain from passing the software to third parties; instead you are asked to pass our (E-Mail) address to them, so we can send the software upon their request. The reason is, that in this way we have a complete overview of the users of the software, enabling us to keep everyone informed of further developments. Implementation -------------- The implementation is described in LGR report No 12: `The LAMBDA method for integer ambiguity estimation: implementation aspects'. Instead of aiming for utmost efficiency, our goal has been to make an implementation that is clear and that has a one-to-one correspondence to the report. For the accessing scheme of the matrices, we use the standard Matlab 2-dimensional array, even in the case where the matrix is symmetric or triangular. We are sure that still some efficiency can be gained, but for educational reasons, as well for reasons of easy software maintenance we refrained from that. Testing and Updates ------------------- We welcome any suggestion for improvement of the code, the in-source documentation and the description in the report. We also would like to encourage you to communicate to us about results obtained with the LAMBDA method, and comparisons made with other methods. We would also be much obliged if you inform us in case you decide to use the method commercially. As said before, there are no restrictions on that, other than properly acknowledging the designers of the method and their employer. At this moment, several implementations in other computer languages (C, C++) have been derived from the original Fortran version; none of them has been made public yet however. If you are planning to make a version in an other language, and would like to make it public, we would like you to contact us, in order to coordinate the efforts. Updated information about the LAMBDA method will be available at http://www.geo.tudelft.nl/mgp/lambda/ System requirements: -------------------- The routines were written and tested on a PC, running Windows 95, with Matlab version 5.1. Later on, the routines were also tested using Matlab 5.2 on a PC, running Linux (RedHat 5.2, kernel 2.0.36) as well as on a HP9000, running the HPUX operating system (version B.10.20). Although not tested, it is believed that the routines will run on any system on which Matlab is installed. As far as known, none of the newer additions to Matlab were used, so it should work on older versions as well. The included demonstration requires graphical capabilities, so a windowing-system (either X11 or MS) is necessary for using the demonstration. Installation: ------------- The software is provided as either a "zip-file", or a compressed unix "tar-file". Extract all files, using your favourite software, to any directory you wish. Make sure the directory is in the Matlab path. If necessary, the directory can be added to the Matlab path with the following commands, depending on your operating system: Unix: path (path,'/yourhome/yourdirectory'); VMS: path (path,'YOURDISK:[yourhome.yourdirectory]'); DOS/Windows: path (path,'yourhome\yourdirectory'); Mac: path (path,'Yourdisk:yourdirectory:'); It might be a good idea to place such a statement in your startup.m file, to avoid the necessity of issuing this command every time you wish to use the routines. See your local installation of Matlab for instructions of how to do this. Distibuted files: ----------------- chistart.m M-file to compute the size for the search ellipsoid Contents.m M-file, table of contents for Matlab help system decorrel.m M-file to decorrelate the ambiguities geofree.mat Example, 2-dimensional, can be used in demonstration lambda.ps Documentation, in PostScript format lambda.pdf Documention in portable document format lambda1.m M-file, main routine, complete version, with options lambda2.m M-file, main routine, straigthforward solution, no options large.mat Example, 12-dimensional, can NOT be used in demonstration ldemo.m M-file, demonstration ldldecom.m M-file, LtDL-decompostion lsearch.m M-file, ambiguity search readme.txt This file sixdim.mat Example, 6-dimensional, can be used in demonstration small.mat Example, 3-dimensional, can be used in demonstration writemat.m M-file, write matrices, only used in demonstration Selected Literature on the LAMBDA method ---------------------------------------- Teunissen, P.J.G. (1993) Least-squares estimation of the integer GPS ambiguities. Invited lecture, Section IV Theory and Methodology, IAG General Meeting, Beijing, ***, August, also in Delft Geodetic Computing Centre LGR series, No. 6, 16 pp. Jonge de, P.J., and C.C.J.M. Tiberius (1996) The LAMBDA method for integer ambiguity estimation: implementation aspects. Delft Geodetic Computing Centre LGR series, No. 12. Available at "ftp://ftp.geo.tudelft.nl/pub/dejonge/papers/" as PostScript version: lgr12.ps Teunissen, P.J.G. (1995) The least-squares ambiguity decorrelation adjustment: a method for fast GPS integer ambiguity estimation. Journal of Geodesy, Vol. 70, No. 1-2, pp. 65-82. Teunissen, P.J.G. and Kleusberg, A (19***) GPS for Geodesy, second enlarged edition, Springer Verlag See especially chapter 8, GPS carrier phase ambiguity fixing concepts. More literature can be found on our website, http://www.geo.tudelft.nl/mgp, look for "publications" ------------------------------------------------------------------------ Peter Joosten Phone..: (31)15-2782713 Delft University of Technology Fax....: (31)15-2783711 Faculty of Civil Engineering and Geosciences Thijsseweg 11 2629 JA Delft The Netherlands Email..: P.Joosten@geo.tudelft.nl "One mile of road or railway brings you nowhere, one mile of runway brings you everywhere" ------------------------------------------------------------------------

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