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

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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

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Fully-Automated Observation

• Control by internet

• Edit observation schedule by internet

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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 -

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