Speaker
Description
The International Civil Aviation Organization (ICAO) space weather service provides space weather alerts and forecasts for the aviation industry. It is comprised of four global centres: ACFJ (Australia, Canada, France, and Japan), PECASUS (Finland, UK, Italy, Belgium, Austria, Netherlands, Germany, Poland, and Cyprus), SWPC (USA), and CRC (China and Russia). The responsibility for the production of advisories is rotated every 2 weeks between centres, such that each centre is the on-duty centre for 2 out of every 8 weeks. Each centre has to abide by strict guidelines for the space weather advisories that are disseminated. ACFJ have been providing operational space weather information service alongside the other global Space Weather centres since 2019.
Within ACFJ, GNSS advisories are issued by France, represented by the SPECTRA consortium composed of ESSP, CLS and Météo-France, whenever total electron content (TEC) and scintillation data reach critical thresholds as specified by ICAO. The role of ESSP is to monitor TEC and scintillation data provided by all contributing ACFJ partners to create the advisories. Global scintillation data is provided by CLS using various networks of GNSS geodetic receivers, whereas global TEC data is supplied by the Polytechnic University of Catalonia (UPC). TEC and scintillation data are also observed and modelled by Natural Resources Canada (Canada) and National Institute of Information and Communications Technology (Japan) who provide information continuously to ESSP with alerts when their data passes the ICAO moderate and severe thresholds. Once an event is confirmed, an advisory is generated and sent to Météo-France which then disseminates it to airspace users.
In this presentation, we provide an overview of the GNSS advisory production and dissemination process, including how decisions are made regarding the validation of these advisories, and the performance of ACFJ with regard to GNSS advisories. An example of the advisory validation process, particularly during more extreme space weather periods, is provided. Finally, we outline future evolutions to further improve the service and the provision of GNSS advisories, including the harmonisation of GNSS advisories between global warning centres and the implementation of polygons to improve the spatial resolution of the advisories disseminated.
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