TECO Geneva1 Integrated Quality Control Functions on AWS-Level Gealog SG Station Manager Gerhard Pevny, Logotronic GmbH, Austria Dietmar Pindeus, Logotronic GmbH, Austria

TECO Geneva2 Integrated Quality Control IQC Starting Point - User Community  There are still only few, not detailed recommendations regarding quality control procedures  High demand for concrete recommendations for QM on 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 Geneva3  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 Integrated Quality Control IQC Starting Point - Logotronic

TECO Geneva4 Integrated Quality Control IQC Technical 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 Geneva5 Sensor Station Manager Communication Network Centre Where should Quality Control be applied?  Quality control on all levels of the measuring network 1. User Interventions 3. Working Environment 4. Hardware Plausibility 5. System Time 6. Data Transfer Channels to Network Centre 2. Metadata

TECO Geneva6 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 Geneva7 QC on User Interventions User Identification

TECO Geneva8 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 Geneva9 Metadata Stored on AWS Level

TECO Geneva10 Metadata on AWS Level

TECO Geneva11 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 Geneva12 Gealog Measuring Interface Gealog Measuring Interface Sensor 1 Sensor 2 Broken Wires Loose Wires Standardized Gealog RS485-Fieldbus Intelligent Sensor 1 Hardware related QC - The Galog Measuring Interface Concept External Communication Lines Fan, Heater Sensor Status and Protocol Check Gealog Measuring Interface

TECO Geneva13 Plausibility Tests - standard Tests

TECO Geneva14 Additional Plausibility Tests

TECO Geneva15 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 Geneva16 Redundant Sensors

TECO Geneva17 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 Geneva18 Recording of a Quality Tag  The information-set for each data item is now:  Time stamp - Measuring value - Quality Tag

TECO Geneva19 Quality Tag Actually defined quality tag values: IdentifierDescription ANo errors detected PPlausibility error detected CNo measuring value existing, fatal error Dfree WMaintenance ZTime error detected KManually inputted check value

TECO Geneva20 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 Geneva21 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 Geneva22 Integrated Quality Control Functions on AWS-Level Gealog SG Station Manager Thank you! Please send comments to