PART 1 — GENERAL (GEN)

GEN 3.5 - 201 FEB 20073. Meteorological observations and reports3.1. Table GEN 3.5.3 Meteorological observations and reportsName of station/LocationindicatorMACAU/MacauVMMCType &frequency ofobservation/automaticobservingequipmentType of METReports &SupplementaryinformationincludedAIP MACAOHours ofObservation System & Sites Operation1 2 3 4 5 6Hourly plus METAR,H24 NIL.specialSPECIObservation TREND WSCUP anemometer RWY 16CUP anemometer RWY 34CUP anemometer middle ptTransmissometer RWY 16Transmissometer RWY 34Transmissometer middle ptCeilometer RWY 16Ceilometer RWY 34AWS middle ptClimatologicalinformationExplanatory Note: METARSPECITRENDWSH24Routine weather reportSelected special weather reportLanding forecastWind shear24 hours3.2. Observing system and operating procedures3.2.1. Surface wind is measured by three cup anemometers mounted on the masts of 10 metershigh. The actual height of the anemometers is approximately 7 meters above the runway.Two of the anemometers are set abeam the 16 and 34 touchdown zone and the other one isset abeam the middle point. All three anemometers are positioned at a distance of 130meters on the East side of the runway centre line. Wind indicators are installed in themeteorological office and the air traffic services units. Observations made at the middlepoint anemometer constitutes the official wind report.3.2.2. RVR is measured by three transmissometers set abeam of both the touchdown zone and themiddle point of the runway. They are positioned at a distance of 120 meters on the Eastside of the runway centre line and are 2.5 meters above the runway. RVR values derivedfrom the transmissometers located near the touchdown zone are include in the MET reportwhenever the horizontal visibility is observed to be less than 1500 meters.3.2.3. The height of cloud base is measured by two ceilrometers located at either end of therunway at distance of 105 meters on the East side of the runway centre line.3.2.4. An Automatic Weather Station located near the middle transmissometer is used to measurethe air temperature, dew point temperature, atmospheric pressure and precipitation. All thereadings of the sensors and the calculated QNH and humidity are displayed in the weatherterminal in Meteorological office and ATC.AMDT 14Civil Aviation Authority – Macao, China