This paper questions whether satellite navigation systems (SatNav) in their current form will be useful in future automated vehicles. We highlight the current challenges to the design of SatNav systems and point out how aspects of these may no longer be essential during the transition towards more highly automated vehicles. Finally we pose a number of research questions that may be helpful to u...

This paper presents aspects related to the definition, management, and communication of data quality with application to a multivariate data set from Global Navigation Satellite System (GNSS). We stated about the quality in a context of scientific research with GNSS data presenting quality elements that can be applied to scientific research. A case study focusing on time varying quality element...

In order to enhance the accuracy of the relative velocity measurement for the Mars 13 explorer formation flight, we develop a relative velocity measurement method. In this method, the 14 spectrometers at two Mars explorers are adopted to measure the starlight frequency shift and to 15 estimate the velocity with respect to the star. Unfortunately, the instantaneous velocity of star can 16 not be...

This paper proposes a methodology to design a regional navigation system using geosynchronous satellites and stratospheric airships. One important factor in designing a navigation system is dilution of precision. We design a regional navigation system based on the simulations of the system’s dilution of precision. The system would consist of geosynchronous orbit satellites and stratospheric air...

The primary goal of the Stockholm Educational Air Shower Array (‘SEASA’) project is to bring the intellectual and technical challenge of scientific research to high-school (16 – 18 years old) students. The focus of the project is the high energy cosmic radiation which continually bombards the earth’s atmosphere, generating showers of secondary particles. These showers can be detected by a netwo...

This paper presents the results of the study of a number of options for the provision of integrity data for GPS satellites within the Galileo architecture, and their corresponding impacts. The project was supported by Alcatel Space and was a contribution to the Galileo definition studies (supported by the European Community under the GALA project), addressing in particular, the definition of st...

Triple-frequency GNSS has been intensively studying in the past decades, especially with the open service of China’s BeiDou system. In this review, we will address the ambiguity resolution, benefits gained from additional frequency signals compared to the dual-frequency GNSS signals, as well as analyse the challenges of triple-frequency GNSS for future development. We first review and compare t...

Based on the cancellation and reinforcement of the autocorrelation side-peaks and main-peak, respectively, this paper proposes an improved unambiguous tracking scheme for composite binary offset carrier (CBOC) signals used in the Galileo system. Dividing the CBOC autocorrelation into multiple partial correlations, first, we obtain individual correlation components making up the autocorrelation ...

By August 2016, 5 new-generation BeiDou satellites (BeiDou-3) have successfully been launched. The observations of a very limited number of 9 International GNSS (Global Navigation Satellite System) Monitoring and Assessment Service (iGMAS) stations and 52 Multi-GNSS Experiment (MGEX) stations from 16 July to 14 August 2016 are processed to determine the orbits of BeiDou-3 and BeiDou-2 satellite...

The Chinese BeiDou system (BDS), having different types of satellites, is an important addition to the ever growing system of Global Navigation Satellite Systems (GNSS). It consists of Geostationary Earth Orbit (GEO) satellites, Inclined Geosynchronous Satellite Orbit (IGSO) satellites and Medium Earth Orbit (MEO) satellites. This paper investigates the receiver-dependent bias between these sat...