“Quickmaps and history of the effects of ionospheric scintillations on GPS/GLONASS signals” Project status SDA for ESA Space Weather Applications Pilot.

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Presentation transcript:

“Quickmaps and history of the effects of ionospheric scintillations on GPS/GLONASS signals” Project status SDA for ESA Space Weather Applications Pilot Project J.J. Valette, B. Nhun Fat, P. Yaya 1 In partnership with F. Boucquaert 2, P. Lassudrie-Duchesne 3, M. Chouffot 4 U. Hugentobler 5, C. Hanuise 6, J.L. Issler 7, J. Lanciau 8, R. Warnant 9 1 Collecte Localisation Satellites 2 Fugro 3 Ecole Nationale Supérieure de Télécommunications - Bretagne 4 Direction Générale de L’Aviation Civile 5 Astronomical Institute of the University of Berne 6 Laboratoire de Physique Chimie de l’Environnement 7 Centre National d’Etudes Spatiales 8 Rockwell Collins 9 Royal Observatory of Belgium Contact : ESA Space Weather Workshop: Developing a European Space Weather Network ESTEC, Noordwijk, 3-5 November 2003

ESA Space Weather Workshop: Developing a European SWENET 3-5/11/2003 ESTEC, Noordwijk, The Netherlands « …scintillations effects on GPS/GLONASS signals » Introduction Project status l User needs & technical specifications l Service development starting l User Interface web site data bank l Calibration

ESA Space Weather Workshop: Developing a European SWENET 3-5/11/2003 ESTEC, Noordwijk, The Netherlands « …scintillations effects on GPS/GLONASS signals » Industry : user needs Priorities from 1 (highest) to 3 (lowest) knowing the context of the original proposal Constraints (nrt for near real time, pred for prediction)

ESA Space Weather Workshop: Developing a European SWENET 3-5/11/2003 ESTEC, Noordwijk, The Netherlands « …scintillations effects on GPS/GLONASS signals » Science : user needs ROB Priorities from 1 (highest) to 3 (lowest) knowing the context of the original proposal

ESA Space Weather Workshop: Developing a European SWENET 3-5/11/2003 ESTEC, Noordwijk, The Netherlands « …scintillations effects on GPS/GLONASS signals » Technical specifications: scintillations products User needs list (Ref. number) Service development plan Product Basic Service Added value Future SCINT Scintillations Where and When Intensity Worst case Prediction global maps of scintillation location global maps of scintillation index Study report, alert message (tbd) models testing and comparison X b.e. X X Maps : discrete, projection at sub-ionospheric point, with night/day transition, 1h refreshment (objective) 24 hours animation

ESA Space Weather Workshop: Developing a European SWENET 3-5/11/2003 ESTEC, Noordwijk, The Netherlands « …scintillations effects on GPS/GLONASS signals » Service development: starting

ESA Space Weather Workshop: Developing a European SWENET 3-5/11/2003 ESTEC, Noordwijk, The Netherlands « …scintillations effects on GPS/GLONASS signals » Service development: preliminary criteria analysis Ionospheric scintillations identification mixed criteria: 1: cycle slip levels on both frequencies 2: power attenuation 3: phase fluctuations 4: losses of observation (especially L1-L2) Test on criteria 4 (L2 losses) 1 day at Fortalezza Local time: 20h Local time: 21h

ESA Space Weather Workshop: Developing a European SWENET 3-5/11/2003 ESTEC, Noordwijk, The Netherlands « …scintillations effects on GPS/GLONASS signals » User Interface Web site: under construction Data bank: NetCDF format files for scintillations & TEC > array-oriented scientific data > machine-independent format > dimensions, variables, attributes (global, local) ( / )( /

ESA Space Weather Workshop: Developing a European SWENET 3-5/11/2003 ESTEC, Noordwijk, The Netherlands « …scintillations effects on GPS/GLONASS signals » Web site: homepage under construction

ESA Space Weather Workshop: Developing a European SWENET 3-5/11/2003 ESTEC, Noordwijk, The Netherlands « …scintillations effects on GPS/GLONASS signals » Calibration ISM (Ionospheric Scintillation Monitors) Data sets from IESSG at Nottingham Univ. of 5 ISMs in Europe One dedicated ISM is planned at Kourou