Implementation of an Open-Source Software Suite for the Galileo High Accuracy Service

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master_Horst_Oliver_2021.pdf (1.95 MB)

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Sähkötekniikan korkeakoulu | Master's thesis
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Date

2021-12-31

Department

Major/Subject

Autonomous Systems

Mcode

ELEC3055

Degree programme

Master's Programme in ICT Innovation

Language

en

Pages

49+4

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Abstract

Global Navigation Satellite Systems (GNSS) have already become an integral part of today's technology-driven society. The emerging of new technologies, requiring highly accurate positioning services, has given rise to multiple providers offering augmentations to the freely available navigation solutions. With the conversion of the Galileo Commercial Service (CS) into the High Accuracy Service (HAS), the European Galileo program is to offer an alternative to these costly providers, by making a decimeter-accurate positioning service for free to users worldwide. However, being a new service, the initial impact on the GNSS community can be limited. This thesis concentrates on ways of promoting this service and increasing its accessibility. To do so, a standalone Python library is developed to bring the encoded transmission data into a format known to commonly used Precise Point Positioning (PPP) tools. In addition, such a PPP tool is adapted to process the data to offer an easy-to-use solution to assess the capabilities of the HAS. Both software solutions together are used to evaluate the HAS in its current development status and reveal a greatly improved performance over standard solutions. Lastly, a proposal for a new HAS message format is made with the aim of ensuring the quality of the service in the long run. Yet, as the evaluation revealed performance issues in a few aspects, some further investigation is advised.

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Supervisor

Praks, Jaan

Thesis advisor

Malkamäki, Tuomo

Keywords

GNSS, Galileo, high accuracy service, precise point positioning, GNSS augmentation

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https://urn.fi/URN:NBN:fi:aalto-202202061786

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[dipl] Sähkötekniikan korkeakoulu / ELEC