GPS World, November 2018
COVERSTORY 18 GPS WORLD WWW GPSWORLD COM NOVEMBER 2018 IN ULTRA TIGHT WITH NEW SIMULATION TOOL A GPS INERTIAL TRAJECTORY DATA SIMULATION PODIUM can generate simulation data sets for all levels of GPS INS integration Here it verifies the operation and performance of a new ultra tight GPS INS integrated system adaptable for both software and conventional hardware receivers BY Malek O Karaim Mohamed Youssef and Aboelmagd Noureldin N avigation systems for land vehicles embedded in p as senge r car s ambulances police cars fire trucks and others provide reasonable accuracy in open sky environments but under conditions such as underpasses and tunnels GPS satellite signals cannot be readily tracked since they are not consistently available or have low signal power One major factor that directly impacts the effectiveness of receivers in terms of complexity and speed is receiver architecture Scalar conventional signal tracking architectures process each satellite signal individually pseudoranges and pseudorange rate measurements are produced separately and only combined in the navigation filter to generate the required solution Hence no information exchange happens between the different tracking channels Photo metamorworks Shutterstock com All other images provided by the authors
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