If you wish to contribute or participate in the discussions about articles you are invited to join Navipedia as a registered userThe E1 Open Service (OS) modulation receives the name of CBOC (Composite Binary Offset Carrier) and is a particular implementation of MBOC (Multiplexed BOC) [J.-A. Avila-Rodriguez et al., 2007]. MBOC(6,1,1/11) is the result of multiplexing a wideband signal – BOC(6,1) – with a narrowband signal – BOC(1,1) – in such a way that 1/11 of the power is allocated, in average, to the high frequency component. This signal was the last one to be defined.
If you wish to contribute or participate in the discussions about articles you are invited to join Navipedia as a registered userPrecise point positioning (PPP) stands out as an optimal approach for providing global augmentation services using current and coming GNSS constellations. Combining the precise satellite positions and clocks with a dual-frequency GNSS receiver, PPP is able to provide position solutions at centimetre to decimetre level. PPP requires fewer reference stations globally distributed rather than classic differential approaches (e.g. RTK), also one set of precise orbit and clock data (computed by a processing centre) is valid for all users everywhere, and the solution is largely unaffected by individual reference-station failures. There are always many reference stations observing the same satellite because the precise orbits and clocks are calculated from a global network of reference stations. As a result, PPP gives a highly redundant and robust position solution.