In this contribution, a novel un-differenced (UD) (PPP-RTK) concept, i.e. synthesis of Precise Point Positioning and Network-based Real-Time Kinematic is introduced. the first step our PPP-RTK approach, UD GNSS observations from regional reference network are processed based upon re-parameterised observation equations, corrections for satellite clocks, phase biases (interpolated) atmospheric delays calculated provided to users. second step, these network-based used at user site restore...

The BeiDou Navigation Satellite System (BDS) has become fully operational in the Asia-Pacific region and it is of importance to evaluate what BDS brings when combined with Global Positioning (GPS). In this contribution we will look at short, medium long single-baseline real-time kinematic (RTK) positioning performance. Short baseline refers distance between two receivers most a few kilometers so that relative slant ionospheric tropospheric delays can be assumed absent, whereas refer...

Successful carrier phase ambiguity resolution is the key to high-precision positioning with Global Navigation Satellite Systems (GNSS). The dilution of precision (ADOP) a well-known scalar measure which can be used infer strength GNSS model for resolution. In this contribution we present analytical closed-form expressions ADOP. This will done whole class different multi- frequency single baseline models. These models include geometry-fixed, geometry-free and geometry-based models,...

High-precision (centimeter-level) real-time kinematic precise point positioning (PPP-RTK) becomes feasible when using corrections, as received from a regional Continuously Operating Reference Station network. These network corrections comprise (biased) satellite clocks, phase biases, and ionospheric delays, where the latter ones are interpolated to approximate location of PPP-RTK receiver. Thus far, very fast integer ambiguity resolution performance has been reported based on dual-frequency...

Australia is a beneficiary of the current regional BeiDou configuration, as enough satellites are available for Positioning, Navigation and Timing (PNT). The present contribution Part II out two parts that consider first combined BeiDou+GPS results in Australia. In I we analysed code-only single-receiver relative point positioning performance. this will evaluate single- multiple-frequency single-baseline RTK model. performance evaluated by ambiguity success-rates comparing estimated...

The development of an Australian PPP-RTK processing platform is important component a multi-GNSS (global navigation satellite system) enabled national positioning infrastructure. concept extends the precise point (PPP) by providing single-receiver users with information enabling integer ambiguity resolution, thereby reducing convergence times as compared to that PPP. In this contribution we present and discuss underlying principles for both network user. We demonstrate its GPS-based...

This contribution covers precise (cm-level) relative Global Navigation Satellite System (GNSS) positioning for which the baseline length can reach up to a few hundred km. Carrier-phase ambiguity resolution is required obtain this high accuracy within manageable observation time spans. However, such long baselines, differential ionospheric delays hamper fast as based on current dual-frequency Positioning (GPS). It expected that modernization of GPS towards triple-frequency system, well...

In this contribution, optimal ionosphere-free combinations for a modernized triple-frequency global positioning system (GPS) are derived. It is shown that these directly related to the model based on carrier phase observations only, in which ionospheric delays estimated. For and thus combinations, integer ambiguity estimation possible, contrast what often read GPS literature. article estimable ambiguities presented expected success rates when trying resolve given. addition, baseline...

In the next five to ten years, evolution of Global Navigation Satellite Systems (GNSSs) will have a revolutionary impact on positioning performance. More GNSSs become available with improved signal characteristics. At same time, enhancement receiver technology and algorithms is ongoing. light these developments, it investigated whether high-precision relative single-frequency receivers feasible, and, if so, under which circumstances. We submit that this would open door wide range...

First results are presented for precise (mm/cm-level) short-baseline RTK positioning based on single-frequency GPS data combined with of GIOVE-A/B, the two experimental Galileo satellites, collected in Australia. The paper first focuses model GPS+Galileo observation equations and addresses issues that arise when combining both systems, particular inter-system biases (ISBs). Our indicate differential ISBs quite stable time, potentially enabling calibration a priori correction phase code...

Cycle slips are a common error source in Global Navigation Satellite System (GNSS) carrier phase measurements. In this paper, the cycle slip problem is approached using Receiver Autonomous Integrity Monitoring (RAIM) methodology. Carrier measurements used here single-receiver time-differential positioning method where integer ambiguities canceled, but any remain. The performance of was assessed by comparing detection results to Real-Time Kinematic (RTK) solution and manual data examination....

The Chinese BeiDou-2/COMPASS Navigation Satellite System has attained regional operational status and is expected to reach the same level of popularity as GPS once it reached its full constellation. This contribution considers combined BeiDou+GPS relative code positioning single- multiple-frequency real-time kinematic (RTK) positioning. A system increases redundancy for solving unknown GNSS parameters thus allows more precise position estimates, improved reliability robustness against...

AbstractChina's BeiDou-2/COMPASS is expected to deliver global Positioning, Navigation and Timing (PNT) services by 2020. Australia already a beneficiary of the regional BeiDou configuration, as enough satellites are available perform PNT. The present contribution Part I out two parts that consider first combined BeiDou+GPS positioning results in Australia. In II, we will focus our attention on single-baseline RTK model performance integer ambiguity success rates. considers code-only single-...