Integrated Quality Control Functions on AWS-Level Gealog SG Station Manager

1. Integrated Quality Control Functions on AWS-LevelGealog SG Station Manager Gerhard Pevny, Logotronic GmbH, Austria Dietmar Pindeus, Logotronic GmbH, Austria TECO-2006 - Geneva

2. Integrated Quality Control IQCStarting Point - User Community • There are still only few, not detailed recommendations regarding quality control procedures • High demand for concrete recommendations for QMon AWS level. (QM-terminology, QC-strategies on AWS level, QC algorithms, required metadata, ...) • CIMO Guide (WMO No. 8) contains extensive technical recommendations how to measure meteorological parameters TECO-2006 - Geneva

3. Integrated Quality Control IQCStarting Point - Logotronic • New hardware and software platform for AWS: Gealog SG Station Manager • Using most advanced technology in hardware and firmware • Based on this platform implementation of an extensive automatic quality control system which could be an example for future standardization work TECO-2006 - Geneva

4. Integrated Quality Control IQCTechnical Background • Nearly PC-processing power at AWS-level Implementation of more complex quality control procedures • Use of modern data transfer medias (GPRS, Meteosat HDR, ...)  Possibility to transfer higher quantities of data and therefore integration of additional quality information. TECO-2006 - Geneva

5. Where should Quality Control be applied? 2. Metadata 3. Working Environment 4. Hardware Plausibility  Quality control on all levels of the measuring network Sensor Station Manager Communication Network Network Centre 6. Data Transfer Channels to Network Centre 1. User Interventions 5. System Time TECO-2006 - Geneva

6. Basic QC Philosophy Basic philosophy for the definition of the quality control procedures: “Detection of an error in advance before the error shows influence on the measured time series” TECO-2006 - Geneva

7. QC on User InterventionsUser Identification TECO-2006 - Geneva

8. QC on User Interventions - Log-File • One entry for user-login and logout and each activity- which changes the AWS´s status (i.g. changing of parameters, ...) • Log-File entry contains:Date, time, user-id, short description of activity • Readout of Log-File together with stored measuring data TECO-2006 - Geneva

9. Metadata Stored on AWS Level TECO-2006 - Geneva

10. Metadata on AWS Level TECO-2006 - Geneva

11. Monitoring of the working Environment and internal Parameters of the AWS • Gealog SG offers a set of „internal measuring channels“ • Station battery voltage and temperature • Voltage of the buffer battery used for the internal real -time clock • Internal temperature • External supply voltage (mains or solar) • Door-open contact TECO-2006 - Geneva

12. Hardware related QC - The Galog Measuring Interface Concept Standardized Gealog RS485-Fieldbus External Communication Lines Gealog Measuring Interface Gealog Measuring Interface Gealog Measuring Interface Sensor Status and Protocol Check Broken Wires Loose Wires Intelligent Sensor1 Sensor1 Sensor2 Fan, Heater TECO-2006 - Geneva

13. Plausibility Tests - standard Tests TECO-2006 - Geneva

14. Additional Plausibility Test Use of mathematical formulas to compute specific quality criterias. I.g.: Formula for monitoring of a sensor heater: (Value(C1)<3)&(Value(C2)<2) C1 Air temperature C2 Heater current TECO-2006 - Geneva

15. Redundant Sensors TECO-2006 - Geneva

16. Testing the System Time • Gealog SG offers the synchronization of the real-time clock from the network centre, from GPS or from the Web • At the synchronization the time difference between old and new setting of the clock is computed and checked. If there is a too high time-shift a time-error is detected. Measuring values, influenced by the clock synchronization are marked. TECO-2006 - Geneva

17. Recording of a Quality Tag • The information-set for each data item is now: • Time stamp - Measuring value - Quality Tag TECO-2006 - Geneva

18. Quality Tag Actually defined quality tag values: Identifier Description A No errors detected P Plausibility error detected C No measuring value existing, fatal error D free W Maintenance Z Time error detected K Manually inputted check value TECO-2006 - Geneva

19. Support of manual Quality Control • Integrated graphic display with marking of values with Quality Tag below "A" in the graphic output • Direct connection of a video camera- Recording of images- Visual inspection of the AWS from the office desk TECO-2006 - Geneva

20. Conclusion • Target: Automatic quality management system for the whole measuring network based on ISO9001 recommendations • Consideration for future revisions of the CIMO Guide: - Integration of Quality Tags into the standard data sets- Definition of a Quality Tag system- Recommendations of sensor specific or measuring parameter specific quality checks and procedures on AWS level- Recommendations for AWS metadata including "on-line metadata" like actual images of the station TECO-2006 - Geneva

21. Integrated Quality Control Functions on AWS-LevelGealog SG Station Manager Thank you! Please send comments to gerhard.pevny@logotronic.co.at TECO-2006 - Geneva