GPS World, June 2017
SENSOR FUSION will continue to rely on higher quality sensors to meet strict accuracy requirements ACKNOWLEDGMENTS The authors thank Trevor Condon and Patrick Casiano of NovAtel for collecting and helping to process the data presented in this article and to Sheena Dixon for her tireless editing Manufacturers NovAtel novatel com SPAN technology on the NovAtel OEM7 receiver is the testing and development platform for this research NovAtel OEM7700 GNSS receiver cards and a NovAtel wideband Pinwheel antenna were employed The inertial units under test were an Epson epson com G320 low power small size MEMS IMU Litef www northropgrumman litef com μIMU IC larger tactical grade performance IMU still based on MEMS sensors and a Litef ISA 100C near navigation grade IMU using fiberoptic gyros FOG Although all are excellent performers in their class and capable of providing a navigation quality solution the intent is to show the potential limitations that might arise due to the intended application RYAN DIXON is the chief engineer of the SPAN product line at NovAtel Inc leading a highly skilled team in the development of GNSS augmentation technology He holds a BSc in geomatics engineering from the University of Calgary MICHAEL BOBYE is a principal geomatics engineer at NovAtel and has participated in a variety of research projects since joining in 1999 Bobye holds a BSC in geomatics engineering from the University of Calgary FIGURE 10 Land profile EDT with and without DMI aid over 1 hour GNSS outage JUNE 2017 WWW GPSWORLD COM GPS WORLD 21
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