GM1 MET.TR.210(c)(3) Observing meteorological elements

• ED Decision 2022/004/R found in: ATM/ANS Provision of Services (2017/373) (Mar 2025)

GM1 MET.TR.210(c)(3) Observing meteorological elements ED Decision 2022/004/R RUNWAY VISUAL RANGE (RVR) — USE OF INSTRUMENTED SYSTEMS (a) Since accuracy can vary from one instrument design to another, performance characteristics are to be checked before selecting an instrument for assessing the runway visual range. (b) The calibration of a forward-scatter meter has to be traceable and verifiable to a transmissometer standard, whose accuracy has been verified over the intended operational range. (c) Guidance on the use of transmissometers and forward-scatter meters in instrumented Runway Visual Range systems is given in ICAO Doc 9328 'Manual of Runway Visual Range Observing and Reporting Practices'. GM1 MET.TR.210(c)(3) Observing meteorological elements ED Decision 2022/004/R RUNWAY VISUAL RANGE (RVR) — USE OF INSTRUMENTED SYSTEMS (a)       Since accuracy can vary from one instrument design to another, performance characteristics are to be checked before selecting an instrument for assessing the runway visual range. (b)       The calibration of a forward-scatter meter has to be traceable and verifiable to a transmissometer standard, whose accuracy has been verified over the intended operational range. (c)       Guidance on the use of transmissometers and forward-scatter meters in instrumented Runway Visual Range systems is given in ICAO Doc 9328 'Manual of Runway Visual Range Observing and Reporting Practices'.