Taiwan Automated Telescope (TAT) at Maidanak Wang, Li-Han National Tsing Hua University, Taiwan.
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Transcript of Taiwan Automated Telescope (TAT) at Maidanak Wang, Li-Han National Tsing Hua University, Taiwan.
Taiwan Automated Telescope Taiwan Automated Telescope (TAT) at Maidanak(TAT) at Maidanak
Taiwan Automated Telescope Taiwan Automated Telescope (TAT) at Maidanak(TAT) at Maidanak
Wang, Li-HanWang, Li-Han
National Tsing Hua University, TaiwanNational 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
ObserverInternet
Linux-base Computer
CCD
Equatorial Mount
Electrical Box
Enclosure
Weather Station & GPS
WebCam
Procedure
control control controlcontrol
controlcontrol
control
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 in1. More problems in electronic devices2. 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 in1. More problems in electronic devices2. UPS battery depletion (shortens battery life time)3. Heater OFF → Low temperture → Battery Death
Voltage Data from UPS (after stabilizer )
Date and TimeLine In (Max)
Line In (Min)
Line In (Average
)
Line Out(Average
)Freq
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
p
Power Stability Problems
1. Voltage Fluctuation 2. Power interruption (frequently, long,
unexpected)
Result in1. More problems in electronic devices2. 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 in1. More problems in electronic devices2. 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
shell eg1 eg2 eg3speed eg1, eg2 ,eg3
Suggestions
• Power 1. Monitoring power stability 2. Solving problems of power instability
• Internet 1. Capable of image transfer
Infrastructure needs to be improved.
Thanks Thanks Thanks Thanks
b
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Voltage Data from UPS (after stabilizer )
80
90
100
110
120
2010/6/1221:00
2010/6/1303:00
2010/6/1309:00
2010/6/1315:00
2010/6/1321:00
2010/6/1403:00
2010/6/1409:00
2010/6/1415:00
2010/6/1421:00
2010/6/1503:00
Voltage Max
Min
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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
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Internet Speed Test- Ping -
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Internet Speed Test- Transfer Image -
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Internet Speed Test- Transfer Image -
b