Integrity monitoring

Cadastral Surveyors in rural areas. Do you need ambiguity resolution in multi-GNSS PPP for accuracy or integrity?

Over the past two decades, the PPP user model has been constantly evolving. Each iteration, adding improvements in terms of accuracy and most notably convergence. Research objectives focused on examining the different performance indicators of PPP …

Innovation: Clarifying the ambiguities : Examining the interoperability of precise point positioning products

Ambiguity resolution in precise point positioning (hereafter, PPP-AR) requires that hardware delays within the GPS measurements be mitigated, which will then allow for resolution of the integer ambiguities within the carrier-phase measurements. …

Do we need ambiguity resolution in multi-GNSS PPP for accuracy or integrity?

With the advent of quad-constellation, triple-frequency and external atmospheric constraints being provided to the PPP user, the novelty and focus of this paper is in the quest to answer the question: Do we really need ambiguity resolution in …

Examining precise point positioning now and in the future

PPP. It’s one of the many acronyms (or initialisms, if you prefer) associated with the uses of global navigation satellite systems. It stands for precise point positioning. But what is that? Isn’t all GNSS positioning precise? Well, it’s a matter of …

Integrity Monitoring for Precise Point Positioning

The Precise Point Positioning (PPP) GPS data processing technique has developed over the past 15 years to become a standard method for growing categories of positioning and navigation applications. This includes but is not limited to crustal …

Reduction of PPP convergence period through pseudorange multipath and noise mitigation

Pseudorange multipath and pseudorange noise are the largest remaining unmanaged error sources in PPP. It is proposed that by reducing the effects of multipath and noise on the pseudorange observable, accurate estimates of carrier phase float …