充满挑战的环境中基础设施规划.pdf

1、INFRASTRUCTURE PLANNING IN CHALLENGING ENVIRONMENTThorsteinn JohannessonJanuary 2025SAFETY ASSESSMENTWhen installing infrastructure at airports we are obligated to do Safety assessment.Safety assessments are also done when CNS infrastructure/equipment is installed outside of airport area.We evaluate

2、 the following environmental conditions:Temperature,precipitation,wind speed,dust conditions,lightnings,earthquake conditions,volcanic activity,cracksDuring tender or purchase phase we want the tolerance regarding wind to be very high.At airports we have seen wind speed up to 90 knots.INSTALLATION A

3、ND MAINTENANCEWe have experienced that equipment that manufacturers say will work in our environment does not:ADS-B sensor outdoor boxes did not survive the weather and had to be put inside another outdoor boxes.Metal fastenings were to week.ADS-B antennas from the manufacturer did not withstand the

4、 icing and had to be replaced.Masts have fallen due to high wind and icing.Preventive maintenance is performed during the summer months for the mountain sites:due to difficulty to do out site work in the winter months and to minimize downtime during winter months.INSTALLATION PRACTICE Installations

5、mostly during summertime due to unpredictable and bad weather conditions during the winter months Due to high wind seawater gets on infrastructure and makes erosion a problem.Sealing and making watertight is very important.In Iceland rain comes from all directions so having everything that is outsid

6、e watertight matters All fastenings for masts and antennas must be extra strong to be able to endure the extreme wind and icing All equipment that is possible to locate inside is placed inside Wind sensors are heated Remote HF/VHF/ADS-B and MLAT sites have bac