NovAtel's Annual Journal of GNSS Technology Solutions and Innovation

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Page 17 of 51

novatel correct velocity 2014 For more Solutions visit 18 Not all GNSS uSerS have the same po- sitioning accuracy requirements or the same operational constraints. Today's highly flexible GNSS positioning technology options enable system integrators to assemble the best com- bination of hardware, software and services to meet the cost and performance demands of their specific application. NovAtel CORRECT™ is an innovative addi- tion to NovAtel's scalable OEM GNSS position- ing offerings. It is designed to optimally handle GNSS constellations and corrections to deliver the best possible positioning solution. NovAtel CORRECT with TerraStar Precise Point Positioning (PPP) corrections provides decimetre–level or better positioning, glob- ally. It complements well the existing SBAS, DGPS, RTK, GNSS+INS and GNSS heading options available on NovAtel's OEM6® receiv- er products. PPP Flexibility The technical principle of PPP is that measure- ment errors are mitigated or removed from the position calculation using sophisticated mod- eling techniques and correction products such as precise satellite orbit and clock corrections. GNSS corrections are generated using data from a global reference network and they can be applied anywhere on the Earth. By elimi- nating the need for a local reference receiver or receiver network, users can achieve centi- metre- or decimetre-level positioning in areas where it is not practical to use traditional RTK techniques. PPP positioning service COMPONENTS: 1. Correction products generated by the cor- rection provider. 2. Corrections delivered to the user. TerraStar corrections, for example, are delivered over L- Band satellite. This eliminates the need for a separate data link as is required for traditional RTK positioning. 3. Computation of the position solution on- board a dual-frequency GNSS receiver at the user end. The NovAtel CORRECT PPP solution applies the TerraStar-D corrections and cor- rects for local ionospheric and tropospheric er- rors to produce a decimetre or better solution. Global Connections TerraStar PPP correction products are gen- erated from the proprietary Orbit and Clock Determination System (OCDS). TerraStar op- erates three independently run network con- trol centers, 2 in Aberdeen and 1 in Singapore, Photo courtesy of JLPC/Wikimedia Commons. AdvAnced GnSS PoSitioninG SolutionS with PreciSe Point PoSitioninG (PPP) Flexible positioning technology enables best combination of hardware, software and services to meet cost and performance demands

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