Download Document

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