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de Vries, Maarten (author)Pose estimation through fusion of GNSS with secondary sensors has long been an established field. With the developments surrounding autonomous navigation over the past decade this topic has gained extra importance. In the current literature GNSS based pose and localisation is often improved through fusion with either a IMU}or VS with the goal of...master thesis 2019
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Lamers, Sanne (author)This research focuses on GNSS users interested in a faster position fix in a situation where the receiver holds limited data. This occurs when turning on a mobile phone or sport watch to use a location-based service, driving out of a parking garage with a navigational device or activating a search & rescue beacon. In these cases, users care...master thesis 2019
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Ssenyunzi, Richard Cliffe (author), Oruru, Bosco (author), D'ujanga, Florence Mutonyi (author), Realini, Eugenio (author), Barindelli, Stefano (author), Tagliaferro, Giulio (author), van de Giesen, N.C. (author)The Global Navigation Satellite System (GNSS) can be used to derive accurately the Zenith Tropospheric Delay (ZTD) under all-weather conditions. The derived ZTDs play a vital role in climate studies, weather forecasting and are operationally assimilated into numerical weather prediction models. In this study, variations and statistical...journal article 2019
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Khodabandeh, A. (author), Teunissen, P.J.G. (author)In view of the recent proliferation of low-cost mass-market receivers, the number of network receivers and GNSS users will be growing rapidly, demanding an efficient way of data processing in terms of computational power and capacity. One way of improving the computational capacity is to decentralize the underlying data processing and distribute...journal article 2019
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Wang, Kan (author), Chen, Pei (author), Teunissen, P.J.G. (author)The Japanese Quasi-Zenith Satellite System (QZSS) satellite system has placed in orbit four satellites by October 2017. The Indian Regional Navigation Satellite System (IRNSS) system has launched the new satellite IRNNSS-11 in April 2018, completing seven operational satellites. Together with the GPS block IIF satellites and the Galileo...journal article 2019
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Khodabandeh, A. (author), Teunissen, P.J.G. (author)Estimability and S-systems are important concepts when dealing with rank-defect models. In this contribution, we generalize the concept of estimability to integer estimability and determine the necessary and sufficient conditions that need to be satisfied for parameter functions to be integer estimable. This is then worked out and applied to the...journal article 2019
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Olivares-Pulido, G. (author), Terkildsen, M. (author), Arsov, K. (author), Teunissen, P.J.G. (author), Khodabandeh, A. (author), Janssen, V. (author)Successful implementation of integer ambiguity resolution enabled precise point positioning (aka PPP-RTK) algorithms is inextricably linked to the ability of a user to perform near real-time positioning by quickly and reliably resolving the integer carrier-phase ambiguities. In the PPP-RTK technique, a major barrier to successful ambiguity...journal article 2019
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Teunissen, P.J.G. (author)We introduce a new formulation of the double-differenced GLONASS FDMA model. It closely resembles that of CDMA-based systems and it guarantees the estimability of the newly defined GLONASS ambiguities. The formulation is made possible because of our defining new concept of integer-estimability and the analytical construction of a special...journal article 2019
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Teunissen, P.J.G. (author), Khodabandeh, A. (author)A new integer-estimable GLONASS FDMA model is studied and analysed. The model is generally applicable, and it shows a close resemblance with the well-known CDMA models. The analyses provide insights into the performance characteristics of the model and concern a variety of different ambiguity-resolution critical applications. This will be done...journal article 2019
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Stein, M.S. (author), Fauß, Micheal (author)We consider the problem of making a quick decision in favor of one of two possible physical signal models while the numerical measurements are acquired by sensing devices featuring minimal digitization complexity. Therefore, the digital data streams available for statistical processing are binary and exhibit temporal and spatial dependencies....journal article 2019
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Zaminpardaz, Safoora (author), Teunissen, P.J.G. (author)The DIA-method, for the detection, identification and adaptation of modeling errors, has been widely used in a broad range of applications including the quality control of geodetic networks and the integrity monitoring of GNSS models. The DIA-method combines two key statistical inference tools, estimation and testing. Through the former, one...conference paper 2019
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Pang, Pang (author)Knowing 'where I am' is always essential and a prior to answer for a moving vehicle. Among numerous onboard sensors, a GNSS receiver for single-frequency Precise Point Positioning and camera are competitive due to the fairly lower cost and the potential to provide a lot of useful information.<br/><br/>However, due to the degraded GNSS solution...master thesis 2018
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Krietemeyer, A. (author), ten Veldhuis, Marie-claire (author), van der Marel, H. (author), Realini, Eugenio (author), van de Giesen, N.C. (author)Dual-frequency Global Navigation Satellite Systems (GNSSs) enable the estimation of Zenith Tropospheric Delay (ZTD) which can be converted to PrecipitableWater Vapor (PWV). The density of existing GNSS monitoring networks is insufficient to capture small-scale water vapor variations that are especially important for extreme weather...journal article 2018
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Odolinski, Robert (author), Teunissen, P.J.G. (author)The emerging GNSSs make single-frequency (SF) RTK positioning possible. In this contribution two different types of low-cost (few hundred USDs) RTK receivers are analyzed, which can track L1 GPS, B1 BDS, E1 Galileo and L1 QZSS, or any combinations thereof, for a location in Dunedin, New Zealand. These SF RTK receivers can potentially give...journal article 2018
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Nadarajah, Nandakumaran (author), Khodabandeh, Amir (author), Wang, Kan (author), Choudhury, Mazher (author), Teunissen, P.J.G. (author)Precise point positioning (PPP) and its integer ambiguity resolution-enabled variant, PPP-RTK (real-time kinematic), can benefit enormously from the integration of multiple global navigation satellite systems (GNSS). In such a multi-GNSS landscape, the positioning convergence time is expected to be reduced considerably as compared to the one...journal article 2018
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Imparato, D. (author), Teunissen, P.J.G. (author), Tiberius, C.C.J.M. (author)The Minimal Detectable Bias (MDB) is an important diagnostic tool in data quality control. The MDB is traditionally computed for the case of testing the null hypothesis against a single alternative hypothesis. In the actual practice of statistical testing and data quality control, however, multiple alternative hypotheses are considered. We...journal article 2018
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Supinajaroen, W. (author), van Loenen, B. (author)Acquiring a precise position on the earth is an essential factor in many activities today and will be a prerequisite for future activities. Global Navigation Satellite System (GNSS) Continuously Operating Reference Station (CORS) network or GNSS CORS is an infrastructure that plays a crucial role in precise positioning. However, running GNSS...conference paper 2018
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Zhang, Baocheng (author), Teunissen, P.J.G. (author), Yuan, Yunbin (author), Zhang, Hongxing (author), Li, Min (author)Vertical total electron content (VTEC) parameters estimated using global navigation satellite system (GNSS) data are of great interest for ionosphere sensing. Satellite differential code biases (SDCBs) account for one source of error which, if left uncorrected, can deteriorate performance of positioning, timing and other applications. The...journal article 2018
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Khodabandeh, A. (author), Teunissen, P.J.G. (author)Integer ambiguity resolution (IAR) is the key to fast and precise GNSS positioning and navigation. Next to the positioning parameters, however, there are several other types of GNSS parameters that are of importance for a range of different applications like atmospheric sounding, instrumental calibrations or time transfer. As some of these...journal article 2018
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Teunissen, P.J.G. (author), Khodabandeh, A. (author), Zhang, B. (author)In this contribution, we present full-rank observation equations of the network and user receivers, of mixed types, through an application of S-system theory. We discuss the important roles played by the inter system biases (ISBs), and we show how the three-component structure of PPP-RTK is affected by the inclusion of the ISBs as extra...conference paper 2018