Members should use the monitoring information and reports provided by the WMO Lead Centre for aircraft and satellite data monitoring as an integrated component of the quality management operations of their AMDAR programme. Members should consider the development and implementation of additional monitoring procedures for AMDAR observational data, which might include: – Use of statistics and diagnostic results from their AMDAR quality control procedures (see 1.7.2.1 and Appendix A); – Use of the monitoring results of other WMO Member monitoring centres; – Use of AMDAR information available at the Global Data Centre for Observations; – Intercomparison of AMDAR observations with NWP fields; – Intercomparison of AMDAR observations with other sources of upper-air observations, for example radiosonde data; – Monitoring diagnostics developed and based on other data analysis techniques such as: • Temporal consistency/gradient checks; • Spatial consistency/gradient checks; • Aircraft intercomparison; • Aircraft apparent velocity checks. Members should develop procedures for the analysis of available monitoring information and take prompt and appropriate corrective action (see 2.1.3.6) for systemic defects and issues identified that adversely affect the quality of AMDAR observations provided to WIS. Detailed guidance on quality monitoring and analysis of ABO data is provided in Appendix B. 2.1.3.4 Data management and reporting Members should develop policy and procedures for the management of their AMDAR observations in accordance with the provisions defined above and in sections 1.7, 1.8 and 1.9. 2.1.3.5 Metadata management and reporting Members that provide AMDAR observations to WIS must provide their AMDAR metadata in accordance with the provisions in the Manual on the WMO Integrated Global Observing System (WMO-No. 1160), 2.5 – Observational metadata, 3.5 – Observational metadata, and Appendix 2.4 – The WIGOS metadata standard. Members should manage and report their AMDAR metadata in accordance with the provisions and recommended practices referenced and provided in section 1.10 and Appendix D. 2.1.3.6 Systems operations and management An operational AMDAR system will have several important communications and components, which may include one or more of: based
Table A11. Example of a WSI for an E-AMDAR aircraft Issuer of identifier Category of station identifier Method of allocating issue number Method of allocating local identifier 20005 AMDAR aircraft identifier 0 – aircraft most recently issued the identifier on 1 July 2016 Any other number: To distinguish between different aircraft that used the same aircraft identifier at different times Aircraft identifier Example: Aircraft EU0246 would be represented by Responsibility and procedures for maintenance of metadata within OSCAR As with all OSCAR metadata, Members will be responsible for the routine and timely maintenance of the internationally exchanged component of ABO metadata through manual and/or machine interface to the OSCAR system. Detailed instructions for and guidance on OSCAR metadata maintenance procedures are provided in the Guide to the WMO Integrated Global Observing System. This Guide will contain the OSCAR User Manual, which will include instructions on how to perform manual inputs to the OSCAR system. Automated input will involve a “machine-to-machine” exchange, most likely using XML data format. To allow for the transfer of ABO metadata (not in XML) to OSCAR/Surface, a metadata conversion tool will need to be developed, that is, MSExcel→XML, csv→XML, and the like. This conversion tool will be the responsibility of the programme focal point. Members and ABO focal points of operational ABO programmes should ensure that they make and implement plans for adherence to the above requirements and responsibilities immediately, and should ensure compliance with the requirements for the operation of OSCAR and maintenance of OSCAR metadata upon WMO provision of the relevant regulations and guidance, and notification of completion of the operational implementation of the OSCAR system.
ABO system fleet (name) ABO system Y Will identify a fleet based on a set of aircraft within a particular ABO system type. An aircraft can have more than one ABO system – for example, an aircraft can report under both the AMDAR programme and also provide AIREPs. However a particular aircraft should be associated with only one ABO system fleet within a particular ABO system Japan/AMDAR/Air Nippon B737 USA/ADS-C/International M M M M M M Data origination centre ABO system fleet Y Identity of centre issuing the ABO report to WIS EGRR M* M* M* M* M* M* Data origination centre contact ABO system fleet Y Set of data origination centre contact details: name, email, address, phone number M* M* M* M* M* M* Operating authority ABO system fleet Y Name of organization or country responsible for ownership of the majority of the component sensors deployed – usually the airline United Airways, PAC O O O O O O Operating authority contact ABO system fleet Y Set of data origination centre contact details: name, email, address, phone number O O O O O O Measured variables ABO system fleet Y Provides a key link to the set of measured variable metadata for the system fleet N/A N/A N/A N/A N/A N/A Variable name Measured variable Y Name of the measured variable Air temperature M M M M M M Reporting status Measured variable Y Provides the current status of reporting of the measurement within the downlink messages. Reported (on GTS) M M M M M M Quality status Measured variable Y Provides the current quality status of the measurement. Good M M M M M M Measured units Measured variable Y The units in which the measurement is measured on board the aircraft g/kg M M M M M M Reported units Measured variable Y The units in which the measurement is reported to WIS. % humidity M M M M M M Reported resolution Measured variable Y The resolution to which the measurement is reported to the WIS. 5 g/kg M M M M M M Measurement resolution Measured variable Y The resolution to which the measurement is measured on board the aircraft 1% M M M M M M Smoothing Measured variable Y Has the measurement been smoothed as part of the on-board measurement process? Y M* M* M* M* M* M*
Algorithm Measured variable Y The name, version and/or description of the algorithm used to process the measurement on board the aircraft M* O O O O O Sampling method upper Measured variable Y Indication of method used to sample the measurement in the upper troposphere. Should indicate whether the sampling regime is based on pressure or time Pressure M* NA NA O O O Sampling method lower Measured variable Y Indication of method used to sample the measurement in the lower troposphere. Should indicate whether the sampling regime is based on pressure or time Time M* NA NA O O O Sampling method en route Measured variable Y Indication of method used to sample the measurement while en route. Should indicate whether the sampling regime is based on pressure or time Event-based M* NA NA O O O Sampling frequency ascent upper Measured variable Y Frequency or reporting conditional upon sampling method upper. Used to determine the vertical resolution of the measurement 10 hPa M* NA NA O O O Sampling frequency ascent lower Measured variable Y Frequency or reporting conditional upon sampling method lower. Used to determine the vertical resolution of the measurement 1 min. M* NA NA O O O Sampling frequency descent upper Measured variable Y Frequency or reporting conditional upon sampling method upper. Used to determine the vertical resolution of the measurement 50 hPa M* NA NA O O O Sampling frequency descent lower Measured variable Y Frequency or reporting conditional upon sampling method lower. Used to determine the vertical resolution of the measurement 1 min. M* NA NA O O O Sampling frequency en route Measured variable Y Frequency or reporting conditional upon sampling method en route. Used to determine the horizontal resolution of the measurement 7 min. M* NA NA O O O Ascent second phase level Measured variable Y Estimation of the second phase level for transition between ascent flight phases 1 000 m M* NA NA O O O En route level Measured variable Y Estimation of the en route or cruise level of the fleet 10 500 m M* NA NA O O O Top of descent Measured variable Y Estimation of the top of descent altitude. 6 000 m M* NA NA O O O Uncertainty Measured variable Y Uncertainty of the measurement in reported units 1.0 °C M* M* M* M* M* M* Uncertainty determination method Measured variable Y Method used to determine the uncertainty Comparison with national standard M* M* M* M* M* M*
Airline country ABO system aircraft identifier Y The country in which the airline (and aircraft) are registered Canada M M* M* M* M* M* Parent airline ABO system aircraft identifier N Name of the parent airline Qantas O O O O O O Airline contact ABO system aircraft identifier N O O O O O O Sensor type ABO system aircraft identifier Y Provides a key link to the sets of measured variable metadata for the aircraft Total air temperature probe O O O O O O