Recent GNSS activities in Germany for COST and E-GVAP G. Dick1 X. Li1 , F. Zus1, J. Wickert1 R. Potthast2, M. Bender2, S. Crewell3, S. Steinke3 1GFZ Potsdam 2German Weather Service DWD 3University Cologne COST GNSS4SWEC MC and E-GVAP Meetings October 1, 2015 Wroclaw, Poland COLAGE invited talk: When: April 2 (Friday) at Conference (Atibaia city): Subject: General information of CHAMP mission, Application of GPS occultation data to retrieve TEC, Temperature profile and water vapor, and CHAMP data bank. Audience: South America's Space geophysics community and Graduate students.

Overview GNSS Processing at GFZ NRT: (1) EPOS6 software, E-GVAP operational (2) EPOS8, GPS only, pre-operational (3) EPOS8, Multi-GNSS, MGEX operational + TROPO tests (4) EPOS8, COST Benchmark campaign Real-Time: (5) EPOS-RT, GPS only, pre-operational (6) EPOS-RT, Multi-GNSS, simulated RT test processing

Operational Processing at GFZ E-GVAP official GFZ product, GFZ EPOS6 Software, GPS only PPP strategy, GFZ orbits/clocks as input, CPU of ~10 min ~300 stations in processing (SAPOS+EUREF) ZTD/IWV with 15 min. time resolution STD with 2.5 min., delivered to DWD for testing of STD operator ZTD/IWV/STD in NRT D

Pre-operational NRT Processing EPOS8 software (updated models), PPP strategy ZTD/IWV/STD products, GPS only, GLONASS will be included ~400 stations in processing (SAPOS + EUREF+ global IGS stations) pre-operational test run since January 2014 goal: uploading to E-GVAP STDs delivered to DWD for testing of STD operator D

Real-time Processing ZTD products, GPS only (GLO+GAL+BeiDou testing) 15 Bavarian SAPOS stations in processing since August 2014 30 EPN/IGS sites included for COST RT demonstration campaign since April 2015 Goal: COST2.2 format and delivery to GOP Example: real time ZTDs for BRST 17 – 20 Sep, 2015)

COST Benchmark Processing EPOS8 software, PPP strategy GPS only, GLONASS will be included ~550 stations in processing (Benchmark + global IGS stations) post-processing (daily) / simulated NRT mode (12h sliding window) ZTD/IWV/STD/gradients products slants with and without residuals D

GFS NWM horizontal gradients for Benchmark stations (May 20, 2013) 77 NWM-derived tropospheric parameters GFS NWM horizontal gradients for Benchmark stations (May 20, 2013)

Cooperation with German Weather Service DWD

Development of STD operator Focus: Development of a STD forward operator for improving humidity information of the models Strategy: Assimilation of STD Operator has interfaces to all DWD models (GME/ICON, COSMO-DE) and works with the corresponding assimilation systems (LETKF and 3d-Var) Current status: Operator developed Investigation of observation-minus-background statistics (first results available) Goal: Operational STD assimilation

Validation of Slant Operator with COSMO-DE Statistical example for March 2015 with STDs from EPOS8

Cooperation with University Cologne

Use of GPS-derived IWV for assessing small scale water vapour variability multi-instrument effort at Jülich ObservatorY for Cloud Evolution (JOYCE) High Definition Clouds and Precipitation for Climate Prediction (HD(CP)²) HD(CP)² Observation Period Experiment (HOPE) April and Mai 2013 Steinke et al., Atmospheric Physics and Chemistry

Evaluation of diurnal cycle of IWV in COSMO-REA Mean diurnal cycle of IWV measured with GPS and simulated with COSMO-REA during spring and summer 2007-2013 at 25 GPS stations

Thank you very much!