10Euler H, Goad C C. On Optional Filtering of GPS Dual-Frequency Observations without Using Orbit Information. Bulletin Giodisique, 1991,65(2) : 130 - 143.
3BOJJA J,KIRKKO-JAAKKOLA M,COLLIN J,et al. Indoor locali- zation methods using dead reckoning and 3D map matching[ J]. Journal of Signal Processing Systems, 2014,76(3 ):301-312.
4LEI D, LU W, CUI X, et al. Proceedings of the 2012 international crash,fence on information technology and software engineering[ M ]. [S. l. ] :Springer Berlin Heidelberg, 2013,42(6) :29-35.
