The name, version and/or description of the Algorithm Measured variable Y algorithm used to process the measurement on M* O O O O O board the aircraft Indication of method used to sample the Pressure measurement in the upper troposphere. Should Sampling method upper Measured variable Y M* NA NA O O O indicate whether the sampling regime is based on pressure or time Indication of method used to sample the Time measurement in the lower troposphere. Should Sampling method lower Measured variable Y M* NA NA O O O indicate whether the sampling regime is based on pressure or time Indication of method used to sample the Event-based measurement while en route. Should indicate Sampling method en route Measured variable Y M* NA NA O O O whether the sampling regime is based on pressure or time Frequency or reporting conditional upon sampling 10 hPa Sampling frequency ascent Measured variable Y method upper. Used to determine the vertical M* NA NA O O O upper resolution of the measurement Frequency or reporting conditional upon sampling 1 min. Sampling frequency ascent Measured variable Y method lower. Used to determine the vertical M* NA NA O O O lower resolution of the measurement Frequency or reporting conditional upon sampling 50 hPa Sampling frequency Measured variable Y method upper. Used to determine the vertical M* NA NA O O O descent upper resolution of the measurement Frequency or reporting conditional upon sampling 1 min. Sampling frequency Measured variable Y method lower. Used to determine the vertical M* NA NA O O O descent lower resolution of the measurement Frequency or reporting conditional upon sampling 7 min. Sampling frequency en Measured variable Y method en route. Used to determine the M* NA NA O O O route horizontal resolution of the measurement Estimation of the second phase level for transition 1 000 m Ascent second phase level Measured variable Y M* NA NA O O O between ascent flight phases Estimation of the en route or cruise level of the 10 500 m En route level Measured variable Y M* NA NA O O O fleet Estimation of the top of descent altitude. 6 000 m Top of descent Measured variable Y M* NA NA O O O Uncertainty of the measurement in reported units 1.0 °C Uncertainty Measured variable Y M* M* M* M* M* M* Uncertainty determination Method used to determine the uncertainty Comparison with national Measured variable Y M* M* M* M* M* M* method standard
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*
WMO_Guide_to_ABO_V1F-1_WJR_clearcopy_furtherchangesincludingDLs_DL_29Nov2017.docx