TECO-2006 - Geneva1 Integrated Quality Control Functions on AWS-Level Gealog SG Station Manager Gerhard Pevny, Logotronic GmbH, Austria Dietmar Pindeus,

TECO-2006 - Geneva 1

Integrated Quality Control Functions on AWS-Level

Gealog SG Station Manager

Gerhard Pevny, Logotronic GmbH, Austria

Dietmar Pindeus, Logotronic GmbH, Austria


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


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 IQCStarting Point - Logotronic


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.


SensorStation

ManagerCommunication

NetworkNetworkCentre

Where should Quality Control be applied? Quality control on all levels of the measuring network

1. UserInterventions

3. WorkingEnvironment

4. Hardware Plausibility

5. SystemTime

6. Data Transfer Channels to Network

Centre

2. Metadata


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”


QC on User InterventionsUser Identification


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


Metadata Stored on AWS Level


Metadata on AWS Level


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


Gealog Measuring Interface


Sensor1 Sensor2

Broken WiresLoose Wires

Standardized Gealog RS485-Fieldbus

IntelligentSensor1

Hardware related QC - The Galog Measuring Interface Concept

ExternalCommunication

Lines

Fan,Heater

SensorStatus and Protocol Check



Plausibility Tests - standard Tests


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


Redundant Sensors


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.


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


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


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


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


Integrated Quality Control Functions on AWS-Level

Gealog SG Station Manager

Thank you!

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Documents

TECO-2006 - Geneva1 Integrated Quality Control Functions on AWS-Level Gealog SG Station Manager Gerhard Pevny, Logotronic GmbH, Austria Dietmar Pindeus,