1. Presentation & Evolution of the Shipboard Automatic Weather Station BATOS TECO 2005 - BUCAREST

2. General description of the systems Technical information about the components Current network at Météo France Future work

3. General description Satellite communication Weather sensors Screen

4. General description Automatic acquisition of the basic weather parameters measured by sensors (pression, air and sea surface temperature, humidity, wind) Input of human weather observations Data check, processing and storage Generation and transmission of normalized encoding messages (via satellite) Display of the parameters

5. General description and evolution

6. Technical Information

7.  Pressure 800 to 1100 hPa  Air temperature -30 to +50 °C  Relative humidity 0,8 to 100 % Pressure,Temperature and Humidity PTB 220 & HMP35DE BATOS II : PTU200 (Vaisala)

8. Water temperature PT100 – SPCK PROSENSOR Hull contact sensor (WMO recommandation) (platinium resistor temperature sensor) -80 to +160 °C

9. Wind Speed and Direction n Measures speed and direction (relatively to the ship) n True direction calculated by the software (using speed, heading and the true rout of the vessel) BATOS II : CV3F Ultrasonic Wind Sensor (LCJ Capteurs) New generation wind speed and wind direction measurement device Resolution: 0.1 kn Resolution: 0.1 kn Useful range: 0.5 to 99.5 kn Useful range: 0.5 to 99.5 kn Wind direction resolution : 0.1 degree Wind direction resolution : 0.1 degree Temperature range : 0 to 40°C Temperature range : 0 to 40°C Young 05106 Resolution: 0.2 kn Resolution: 0.2 kn Useful range: 0 to 120 kn Useful range: 0 to 120 kn Wind direction resolution : 3 degrees Wind direction resolution : 3 degrees

10. Screen Miniature marine SOCRIMA Naturally ventilated multi-plate screen providing a good protection of temperature and humidity sensor Enclosure : 20 cm (D) x 50 cm (H) To be installed on the deck

11. Software Checks the measurement to ensure data quality Generates normalized weather messages (code 41) every 1, 3 or 6 hours Sends on automatically the messages via satellite Data storage (hourly, during 6 months) Sensor data display in real-time and help for human observation capture

12. Communication Thrane & Thrane Inmarsat Mini C Thrane & Thrane TT-3026M comprising transceiver, omni-directional antenna and GPS receiver in one single unit

13. Current Network at Météo France

14. Current network at Météo France 30 BATOS set up on VOS (Volontary Observing Ship) in 2004 Increasing of the number of observations Robustness of the system Quality of the data

15. Current network at Météo France

17. Future work Thermosalinometer for TRACKOB messages Data compression Transmission frequency adaptation

18. The End Direction des Systèmes d’Observation Département de l’Observation au Sol Division OCEan – V. UNGER vinciane.unger@meteo.fr