1. AUTOMATIC WEATHER STATION (AWS)

2. 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

3. 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

4. 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 ( MHz)
TX through directional Yagi Antenna
Frequency of data update for winds is sec & for temperature is 1 min
Powered by Solar panel / Mains rechargeable batteries
Set of walkie-talkie for communication

5. 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

6. 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
Dot Matrix Printer
Backup MET Display
IMS Observer PC
System Layout

7. 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

8. 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 : 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 : to 60 degree Celsius

9. Torrodial Transformer
Pressure Sensor
Sensor type: barometer
Type of material: SI capacitive pressure sensor.
Make: Finland.
Specification-
Accuracy : hPa
Range : 600 to 1100 hPa
Operating temperature : 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.

10. 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.

11. Automatic Weather Station
Met Display

12. Automatic Weather Station
ATC Display

13. Automatic Weather Station
Main Menu

14. Automatic Weather Station
Synoptic Data Display

15. Automatic Weather Station
Synop Code Template

16. Automatic Weather Station
Metar Code Template

17. Automatic Weather Station
Diversion Weather

18. Automatic Weather Station
Graphical Data

19. Automatic Weather Station
Archieves