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Overview of GNSS & GNSS-Met situation in France

This overview explores the use of GNSS and GNSS-Met in monitoring severe weather events and climate. It covers operational services, GNSS networks and data analysis centers, research projects, and the processing of GNSS data for weather monitoring. The presentation includes case studies from France and other regions.

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Overview of GNSS & GNSS-Met situation in France

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  1. COST Action ES1206 - GNSS4SWEC Advanced GNSS Tropospheric Products for monitoring Severe Weather Events and Climate Overview of GNSS & GNSS-Met situation in France Reykjavik, 10 March 2016 O. Bock (IGN) • Outline • Operational Services • GNSS networks & data analysis centers • Research projects • HYMEX, REMEMBER, VEGA, AMMA… 1

  2. Operational processing of GNSS (tropo) data • IGN/SGN operationalactivities • RGP (permanent GNSS network – France; 440 stations) • National data center => rinex files (1h/1s, 24h/30s) • NRT + dailyrapid (D+1) products (BERN5.2, GPS only, recent tests with GLONASS) • => E-GVAP AC (sgn_, sgn1, sgnc) = 6 proc. • EPN & IGS • IGS data center (igs.ign.fr) => rinex files & IGS products • Post-processingusing final IGS products => EUREF AC = 3 proc. • IDS (Int. DORIS Service) • DORIS data and products center => IDS AC (ign) • IGN/LAREG operationalactivities • Routine post-processing (GIPSY) of GNSS data for: • ROSEA (network of observatories for Atmospheric Water Monitoring) • Long termresearchobserving programmes (AMMA, HYMEX) • AERIS: NEW national data center for the atmosphereand climate research • CNRS operationalactivities • RENAG (national research GNSS network; subset of RGP + 183 stations) • National data center and post-processingproducts (GAMIT)

  3. RGP (Reseau GNSS Permanent) RENAG (REseau NAtional GPS) EUREF - sgn E-GVAP - sgn

  4. March 2016 : 440 stations Guadeloupe La Réunion Saint Pierre et Miquelon Martinique Mayotte French Guiana

  5. GNSS in research projects • COST GNSS4SWEC • WG1 & WG3 (studies on GNSS processing, assessment of long ZTD/IWV time series, climate model validation) => IGN & ENSTA • WG1 BENCH & tomo (U. Le Mans) • HyMeX (Hydrological cycle in the Mediterranean Experiment, INSU-CNRS, PIs: V. Ducrocq, Meteo-France, and Ph. Drobinksi, CNRS) • Assimilate repro GPS ZTD in AROME model (HyMeX reanalysis 2) • Study Heavy Precip Events during SOP1 (fall 2012) • REMEMBER & Med-CORDEX (REgional climate system ModEls in the Mediterranean, ANR, PIs: Ph. Drobinski and S. Bastin, CNRS) • Evaluate regional (Mediterranean) climate models simulations • VEGA(Water vapour, GNSS & climate, INSU-CNRS, PI: O. Bock) • Produce & validate long time series of GNSS & DORIS IWV data • Evaluate satellite and radiosonde IWV data • Study water cycle & moist processes globally and in polar regions • AMMA& Humidity-Sahara (West African Monsoon and Sahara) • Study water cycle & moist processes (Saharan Heat-Low dynamics) 5

  6. reprocessed E-GVAP SGN IGE ASI 773 stations (3 Analysis Centres) 1046 stations (25 networks) reprocessed by LAREG & e-Geos with GIPSY s/w Period 1 Sep 2012 – 31 Mar 2013 6

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