1. Taiwan Automated Telescope (TAT) at Maidanak Wang, Li-Han National Tsing Hua University, Taiwan

2. Outline Taiwan Automated Telescope Network Issues from TAT Experience at Maidanak Suggestions

3. Taiwan Automated Telescope Network It will consist of several fully-automated telescopes at appropriate longitudes around the world. Current sites Hsinchu, Taiwan (test site) Teide Observatory, Tenerife, Canary Is.,Spain Maidanak Observatory, Uzbekistan Future sites Mauna Loa Observatory, Hawaii Yunnan Observatory, China …….

5. TAT at Teide, Spain

6. TAT at Maidanak

7. Instrumentation Fully automated system 3.5 inch Telescope (Questar, Maksutov Type) German Type Equatorial Mount (Takahashi NJP ) 1024 * 1024 CCD (Apogee U6) No any filters Linux-based Computer

8. Observer Internet Linux-base Computer CCD Equatorial Mount Electrical Box Enclosure Weather Station & GPS WebCam Procedure control eg1eg1 eg2 eg3eg2eg3

9. Outline Taiwan Automated Telescope Network Issues from TAT Experience at Maidanak Suggestions

10. Major Issues from TAT Experience at Maidanak (2007.07 – 2010.06) Electric Power Stability Internet

11. TAT Power System Stabilizer Transformer(22 0V → 110V) UPS Total power consumption : < 2KW cs

12. Power Stability Problems 1. Voltage Fluctuation 2. Power interruption (frequent, long, unexpected) Result in 1. More problems in electronic devices 2. UPS battery depletion (shortens battery life time) 3. Heater OFF → Low temperture → Battery Death

13. Power Stability Problems 1. Voltage Fluctuation 2. Power interruption (frequently, long, unexpected) Result in 1. More problems in electronic devices 2. UPS battery depletion (shortens battery life time) 3. Heater OFF → Low temperture → Battery Death

14. Voltage Data from UPS (after stabilizer ) Date and Time Line In (Max) Line In (Min) Line In (Average) Line Out (Average) Freq 2010/06/13 22:15:24108.00106.50107.20123.1050.00 2010/06/13 22:25:24108.00106.50107.20123.1050.00 2010/06/13 22:35:24108.00106.50107.20123.1050.00 2010/06/13 22:45:24108.00106.50107.20123.1050.00 2010/06/13 22:55:24108.0084.20108.00123.8050.00 2010/06/13 23:05:24108.00106.50107.20123.1050.00 2010/06/13 23:15:24108.00106.50107.20123.1050.00 2010/06/13 23:25:24107.20106.50107.20123.1050.00 2010/06/13 23:35:24108.00106.50107.20123.1050.00 2010/06/13 23:45:24108.00106.50107.20123.1050.00 2010/06/13 23:55:24108.00106.50107.20123.1050.00 p

15. Power Stability Problems 1. Voltage Fluctuation 2. Power interruption (frequently, long, unexpected) Result in 1. More problems in electronic devices 2. UPS battery depletion (shortens battery life time) 3. Heater OFF → Low temperture → Battery Death

16. Weather Data Indication of power interruption

17. Power Stability Problems 1. Voltage Fluctuation 2. Power interruption (frequently, long, unexpected) Result in 1. More problems in electronic devices 2. UPS battery depletion (shortens battery life time) 3. Heater OFF → Low temperature → Battery Death

18. Major Issues from TAT Experience at Maidanak (2007.07 – 2010.06) Electric Power Stability Internet

19. Internet Current status Remote control TAT web page Webcam image (single frame) Incapable of image transfer shell eg1 eg2 eg3eg1eg2eg3 speed eg1, eg2,eg3eg1eg2eg3

20. Suggestions Power 1. Monitoring power stability 2. Solving problems of power instability Internet 1. Capable of image transfer Infrastructure needs to be improved.

21. Thanks Thanks

22. b

23. b

24. Voltage Data from UPS (after stabilizer ) b

25. Fully-Automated Observation Check information on Web Page b

26. Fully-Automated Observation Control by internet Edit observation schedule by internet b

27. Fully-Automated Observation Control by internet Edit observation schedule by internet b

28. Internet Speed Test - Ping - b

29. Internet Speed Test - Transfer Image - b

30. b