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Taiwan Automated Telescope (TAT) at Maidanak Wang, Li-Han National Tsing Hua University, Taiwan Outline • Taiwan Automated Telescope Network • Issues from TAT Experience at Maidanak • Suggestions 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 ……. TAT at Teide, Spain TAT at Maidanak 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 Procedure Observer Internet control Linux-base Computer control CCD control control Electrical Box control Equatorial Mount WebCam control control Enclosure Weather Station & GPS eg1 eg2 eg3 Outline • Taiwan Automated Telescope Network • Issues from TAT Experience at Maidanak • Suggestions Major Issues from TAT Experience at Maidanak (2007.07 – 2010.06) • Electric Power Stability • Internet TAT Power System • Stabilizer • Transformer(22 0V→110V) • UPS Total power consumption : < 2KW c s 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 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 p Voltage Data from UPS (after stabilizer ) Line In (Min) Line In Line Out Freq (Average) (Average) 2010/06/13 22:15:24 108.00 106.50 107.20 123.10 50.00 2010/06/13 22:25:24 108.00 106.50 107.20 123.10 50.00 2010/06/13 22:35:24 108.00 106.50 107.20 123.10 50.00 2010/06/13 22:45:24 108.00 106.50 107.20 123.10 50.00 2010/06/13 22:55:24 108.00 84.20 108.00 123.80 50.00 2010/06/13 23:05:24 108.00 106.50 107.20 123.10 50.00 2010/06/13 23:15:24 108.00 106.50 107.20 123.10 50.00 2010/06/13 23:25:24 107.20 106.50 107.20 123.10 50.00 2010/06/13 23:35:24 108.00 106.50 107.20 123.10 50.00 2010/06/13 23:45:24 108.00 106.50 107.20 123.10 50.00 2010/06/13 23:55:24 108.00 106.50 107.20 123.10 50.00 Date and Time Line In (Max) 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 Weather Data • Indication of power interruption 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 Major Issues from TAT Experience at Maidanak (2007.07 – 2010.06) • Electric Power Stability • Internet Internet Current status • • • • Remote control TAT web page Webcam image (single frame) Incapable of image transfer speed eg1, eg2 ,eg3 shell eg1 eg2 eg3 Suggestions Infrastructure needs to be improved. • Power 1. Monitoring power stability 2. Solving problems of power instability • Internet 1. Capable of image transfer Thanks b b b Voltage Data from UPS (after stabilizer ) Max Min Voltage 120 110 100 90 80 2010/6/12 21:00 2010/6/13 03:00 2010/6/13 09:00 2010/6/13 15:00 2010/6/13 21:00 2010/6/14 03:00 2010/6/14 09:00 2010/6/14 15:00 2010/6/14 21:00 2010/6/15 03:00 Fully-Automated Observation • Check information on Web Page b Fully-Automated Observation • Control by internet • Edit observation schedule by internet b Fully-Automated Observation • Control by internet • Edit observation schedule by internet b Internet Speed Test - Ping - b Internet Speed Test - Transfer Image - b Internet Speed Test - Transfer Image - b