1. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Building and Operating a Station Network for Climatology and Hydrology K. Klapheck, S. Alsen, R. Bauer, A. Bungenstock Deutscher Wetterdienst Hamburg E-mail: Karl-Heinz.Klapheck@dwd.de Sönke.Alsen@dwd.de Rainer.Bauer@dwd.de Andre.Bungenstock@dwd.de Adress: Jenfelder Allee 70a D-22043 Hamburg

2. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten - Introduction - Progress in building up the network - Station description - Facilities of the network - Maintenance of software and hardware - Final remarks

3. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Need for modernizing the voluntary Observer network for climatology/hydrology : by using new measurement- and information-technology and redesigning the net (locations, numbers, equipment of stations): achieve - automizing the readings of instruments - prompting eye observations into electronic data processing

4. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Other objectives of the new network - Improve data quality: same level as data from synoptical stations - fast availability of data - central archiving of data - remote monitoring and remote configuring of stations

5. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Building the network: working routines Activities at the site: - searching for station locations - granting contract with site owner - pre-installation of the measurem. area - provision of ISDN connection - installation of the measurement system - starting up and instruction Providing hardware & software for station & network - fixing user requirements - writing specifications - procurement procedures - acceptance tests of prototypes - tests of series production - system modifications

6. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten

7. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Monitor program

8. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Station scheme Service Programm

9. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Station area

10. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten

11. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Precipitation sensor Ott Pluvio

12. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Observers terminal: main menue Input met. Information actual values time series sent messages display/change system parameters quit

13. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Observers activities send messages at fixed time of the day: - precip. height (control measurem.), snow depth, - state of the ground - estimation of wind, cloudiness, visibility send messages of continuous weather with general time indications or exact time intervals: - falling precipitation: y/n, type, intensity, frequency - deposited precipitation: dew, rime, slippery ice/snow - extraordinary weather appearances: electrical / optical phenomena, turbidity, extreme wind,... Display data, messages and system information Simple maintenance of sensors, set sensor status

14. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Features of the station network center - Calling data sets of time averages / sums of 1 min, 10 min, 1 h, 24 h of met. quantities Calling intervals: 1 h for S and W stations, 24 h for N stations, other intervals: configurable, and immediate calls - Receiving data on: incidents of exceeding thresholds of wind or precip. or certain weather penomena, system errors - Network monitoring from any site of DWD intranet: software update, configuration of station groups, survey of individual stations - Central data base - Backup System - Provisions for IT safety

15. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Scheme of the network composition Lokale Nutzer Landes- Zentralen

16. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Quality assurance of data 1. Provisions at the station: - Range check - Variability check - Generation of a quality byte for each value sent to the network center - Alarm generation 2. Provisions at the network center - Off-line quality control and monitoring system (see Spengler, R., Proc. TECO2002, Dibbern, J., Proc. TECO2005)

17. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten AMDA III / N stations: 24 h sums of precipitation region: NW-Germany date: 20 Nov 06, 05.50 Screenshot of QUALIMET

18. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten System modification and maintenance From the view of resources : expected long lifetime of the network (but no more support from system provider) new requirements from users, remove faults modifications: who can do it ? Station hardware: - components on store - test new marketable components and implement existing software Network center: merging with synopt. network center in preparation Station software: Developers ? (if at hand) DWD staff: keeps system knowledge

19. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Software packages for the station Station computer: LINUX based operating system (proprietary hardware) Application progr. (C), performing : data acquisition, calculations, QA routines, local storage, alarm generation, error messages, communications, configurations. JAVA applet for remote servicing Wireless terminal:proprietary operating system (proprietary hardware) Application progr. (C) for dialogue Service computer:Windows operating system (standard PC)Application progr.( C ++ ), display data and stati, set parameters

20. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Final remarks Benefits of the new network : Improvement of climatological / hydrological data - less expenditure for observers: less errors - fast availability, time resolution of data - increased quality by on-line algorithms, monitoring programs, new hardware Profits for additional users: availability of actual data - AMDA III / S data: complement the synopical station network - AMDA III / N data: useful for flood modelling/forecasting - AMDA III / W data: warning management

21. TECO-2006, 4 dec 2006, Geneva Abteilung Messnetze und Daten Thank you for attention