@article{discovery1344842,
           pages = {14 -- 18+27},
            note = {Full text made available by kind permission of Editor},
            year = {2012},
          number = {2},
         journal = {GPS World},
           title = {Shadow matching: Improved GNSS accuracy in Urban canyons},
          volume = {23},
             url = {http://www.gpsworld.com/wireless/personal-navigation/shadow-matching-12550},
            issn = {1048-5104},
          author = {Groves, PD and Wang, L and Ziebart, M}
}