AUTOMATIC WEATHER STATION (AWS)

Automatic Weather Station INTRODUCTION Weather observing system for Airports It measures, processes, stores, presents and communicates met data Provides data to observers, ATC & other users Designed for IAF requirements Modularity of systems allows future extensions

Automatic Weather Station FIELD EQUIPMENT SENSORS - WIND SPEED - WIND DIRECTION - TEMPERATURE - RELATIVE HUMIDITY - PRESSURE DATA ACQUISITION SYSTEM METEOROLOGICAL MAST SOLAR POWER SYSTEM UHF RADIOS YAGI ANTENNA LIGHTNING ARRESTER SEALED MAINTENANCE FREE (SMF) BATTERY

Automatic Weather Station Sensors mounted on 4m Mast Installed near each end of runways Connected to a Data logger Met data is transmitted to Met Section via a UHF Radio link (450-470 MHz) TX through directional Yagi Antenna Frequency of data update for winds is 5 sec & for temperature is 1 min Powered by Solar panel / Mains rechargeable batteries Set of walkie-talkie for communication

AWS for IAF: System Overview Met Observer Met Display ATC Display Automatic Weather Station AWS for IAF: System Overview Radio Link 400 MHz Master Radio Datalogger, Radio, Pressure Battery, charge controller, Torr Transformer AWS-2 Ethernet converter Switch

Automatic Weather Station Radio Link 400 MHz Datalogger- 1 Sensors Datalogger - 2 Radio- 1 Radio- 2 RS232 Master Radio Rs232 to Ethernet converter 3 Km Ethernet Switch Backup ATC Display 192.168.140.4 Dot Matrix Printer 192.168.140.2 Backup MET Display 192.168.140.5 IMS Observer PC 192.168.140.3 System Layout

Wind Speed Sensor Sensor Type : Opto- Electronics. Type of Material: Carbon Fiber reinforced plastic. Make: Germany. Specification :- Accuracy : +0.5 m/s Range 0 to 75 m/s Operating range temperature : -40 to 60 degree celsius Wind Direction Sensor Sensor Type : Potentiometer. Type of Material : Aluminum Light Weight. Make: Germany. Specification :- Accuracy : 1.5 degree Range 0 to 360 degree Operating temperature : - 40to 60 degree Celsius

Relative Humidity Sensor Temperature Sensor Sensor Type : Type of Material : Platinum pt100. Make: Switzerland. Specification- Accuracy : + .2 degree Celsius Range : - 40 to 60 degree Celsius Operating temperature : - 40 to 60 degree Celsius Relative Humidity Sensor Sensor type: hygromer c94 Type of material: capacitive thin film- polymer. Make: Rotronic. Specification- Accuracy : + 1.5% Range : 0 to 100% Operating temperature : - 40 to 60 degree Celsius

Torrodial Transformer Pressure Sensor Sensor type: barometer Type of material: SI capacitive pressure sensor. Make: Finland. Specification- Accuracy : + 0.2 hPa Range : 600 to 1100 hPa Operating temperature : - 40 to 60 degree Celsius Torrodial Transformer The heating of wind sensors at subzero temperature is achieved using a TORRODIAL transformer It is mounted Inside the battery enclosure and provide 24 AC supply to wind sensor.

Automatic Weather Station Central Meteorological System Dedicated for receiving and displaying Met data from AWS PC with IMS-4 software (creation, receiving, sorting, archiving and utilization) LCD display for Met Office and ATC LAN, RS 232, Radio-modem set for Observer’s workstation.

Automatic Weather Station Met Display

Automatic Weather Station ATC Display

Automatic Weather Station Main Menu

Automatic Weather Station Synoptic Data Display

Automatic Weather Station Synop Code Template

Automatic Weather Station Metar Code Template

Automatic Weather Station Diversion Weather

Automatic Weather Station Graphical Data

Automatic Weather Station Archieves