Sophie Fischer

Network

ORCID digital identifier

ORCID ID: 0009-0001-4285-7024

Projects

• High Integrity Satellite Navigation for UAV using the Galileo HAS / Team member / ongoing
• Spoofer Localization / Team member / completed
• EGNSS DFMC for GBAS bAsed opeRations / Team member / completed
• Emission Reduction using Satellite Navigation for Approach Guidance / Team member / completed

Publications

• Felux, Michael; Fischer, Valentin; Jochems, Sophie; Figuet, Benoit; Monstein, Raphael,

  2025.

  Navigating interference : examining in-flight GNSS spoofing patterns and signal disruptions[paper].

  In:

  Proceedings of the 2025 International Technical Meeting of The Institute of Navigation.

  2025 International Technical Meeting of The Institute of Navigation, Long Beach, CA, USA, 27-30 January 2025.

  Manassas, VA:

  Institute of Navigation.

  Available from: https://doi.org/10.33012/2025.19966

• Felux, Michael; Waltert, Manuel; Jochems, Sophie; Fischer, Valentin; Dautermann, Thomas; Meyer, Oliver,

  2024.

  Effects of GBAS/SBAS precision approach guidance on fuel consumption and CO2 emissions[paper].

  In:

  Proceedings of the 37th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2024).

  37th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+), Baltimore, USA, 16-20 September 2024.

  Institute of Navigation.

  pp. 1612-1618.

  Available from: https://doi.org/10.33012/2024.19836

• Jochems, Sophie; Fischer, Valentin; Felux, Michael,

  2024.

  Galileo HAS availability analysis using the internet data distribution service[paper].

  In:

  Proceedings of the ION 2024 Pacific PNT Meeting.

  Institute of Navigation Pacific PNT Meeting, Honolulu, USA, 15-18 April 2024.

  Institute of Navigation.

  pp. 116-131.

  Available from: https://doi.org/10.33012/2024.19627

• Felux, Michael; Fischer, Valentin; Jochems, Sophie; Osechas, Okuary; Waltert, Manuel; Sarperi, Luciano; Strohmeier, Martin,

  2024.

  A cost-efficient RFI localization approach to detect GNSS jamming and spoofing[paper].

  In:

  Proceedings of the 2024 International Technical Meeting of The Institute of Navigation.

  International Technical Meeting of The Institute of Navigation (ION ITM), Long Beach, USA, 23-25 January 2024.

  Manassas:

  Institute of Navigation.

  pp. 374-380.

  Available from: https://doi.org/10.33012/2024.19482

• Fischer, Valentin; Jochems, Sophie; Jäger, Michael; Sarperi, Luciano; Felux, Michael,

  2023.

  GBAS for UAV operations : the positioning service, vertical integrity and operational lessons learned[paper].

  In:

  Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023).

  36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023), Denver, USA, 11-15 September 2023.

  Institute of Navigation.

  Available from: https://doi.org/10.33012/2023.19288

• Felux, Michael; Jochems, Sophie; Schnüriger, Philipp; Fischer, Valentin; Steiner, Patrick; Jäger, Michael; Sarperi, Luciano; Cacciopoli, Natali,

  2022.

  Flight testing GBAS for UAV operations[paper].

  In:

  Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022).

  35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022), Denver, USA, 19-23 September 2022.

  Institute of Navigation.

  pp. 1576-1588.

  Available from: https://doi.org/10.33012/2022.18428

• Jochems, Sophie; Felux, Michael; Schnüriger, Philipp; Jäger, Michael; Sarperi, Luciano,

  2022.

  GBAS use cases beyond what was envisioned – drone navigation[paper].

  In:

  Proceedings of the 2022 International Technical Meeting of The Institute of Navigation.

  International Technical Meeting of the Institute of Navigation (ION ITM), Long Beach, USA, 25-27 January 2022.

  Manassas:

  Institute of Navigation.

  pp. 310-320.

  Available from: https://doi.org/10.33012/2022.18213

• Fischer, Sophie,

  2026.

  Calculation of GNSS differential code biases via ionospheric delay interpolation.

  Winterthur:

  ZHAW Zurich University of Applied Sciences.

  Available from: https://doi.org/10.21256/zhaw-35077

• Fischer, Sophie,

  2026.

  Swiss ionospheric gradient threat model revisited during solar maximum 2025.

  Winterthur:

  ZHAW Zurich University of Applied Sciences.

  Available from: https://doi.org/10.21256/zhaw-35078

• Fischer, Valentin; Jochems, Sophie; Felux, Michael,

  2024.

  Detection and localization of radio frequency interference sources[paper].

  In:

  Proceedings of the 37th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2024).

  37th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2024), Baltimore, USA, 16-20 September 2024.

  Institute of Navigation.

  pp. 769-780.

  Available from: https://doi.org/10.33012/2024.19710

• Jochems, Sophie; Fischer, Valentin; Felux, Michael; Jäger, Michael; Sarperi, Luciano; Caccioppoli, Natali,

  2023.

  Leveraging GBAS for UAV flights.

  Inside GNSS.

  18(5).

  Available from: https://insidegnss.com/leveraging-gbas-for-uav-flights/

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