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EU-HOUMW training session Limassol, Cyprus December 6-7, 2011
Cezar LEŞANUResearch AssistantAstronomical Observatory-Planetarium Compartment
University “Ştefan cel Mare” of Suceava, Romaniawww.usv.ro
EU-HOUMW Internet Educational Solar Radio Telescope
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Atmospheric opacity
www.wikipedia.com
Advantages of the radio astronomy
Radio observations are possible:• during the day• on full Moon• on bad weather (cloudy sky)• inside and behind dust and gas clouds
1890 Thomas Alva Edison
wwwSource: www.nrao.edu
1897 Sir Oliver J. Lodge
Source: www.nrao.edu
Wilsing şi Scheiner (1896)
Source: www.nrao.edu
Charles Nordman (1900)
Source: www.nrao.edu
What is a radio telescope? http://radiosky.com/simple.html
Small total power radio telescopeusing on the shelf Satelite TV Ku-band equipment
Offset TV satellite dish
Power Supply
14-18V DCAnalog satellite finder
(modified)
LNB
Computer + data logging software
Data acquisition board
Detect microwaves emitted by the Sun and approximate the temperature at ~11GHz (chromosphere)
source: http://sun.kochi-ct.jp/e/observatory.html
Goal of the EU-HOU Internet Solar Radio Telescope
• Bring to the classroom via Internet the Solar radio astronomy (1-2 hours theoretical background, data acquisition, exercises)
• Easy access (user, password), automatic disconnection (10-30 min)
• Multiple user access in real time to the acquired data
• Easy hardware setup for host institutions - no PC server needed, no space/office needed, short cables (mains power, Internet LAN or WLAN)
• Robust enough for long term, intensive use in various weather conditions
Embedded server controllerBlock diagram
User interface
Az-El antenna rotator YAESU G5500
TVSat dish + Ku band LNB
Embedded server
Digitalcomands
AnalogpositionfeedbackRF signal
~1GHz
External IP camera
Internet
Exercises examples
• Where is the Sun? – Calculate the Sun AZ/EL for a given location, date and time (OR use a calculator e.g. http://www.jgiesen.de/SunView/index.htm) .
• Find Antenna Half Power Beam Width (parameter needed for the next exercise, Sun transit - 30 min data acquisition
OR use the HPBW given in the antenna data sheet).
• Measuring the Sun temperature at 11GHz(10min data acquisition, measure the ground and sky temperatures and calculate the Sun’s temperature).
The Internet Solar Radio Observatory Imai Laboratory, Kochi National College of Technology, Japan
source: http://sun.kochi-ct.jp/e/observatory.html
The Internet Solar Radio Observatory Imai Laboratory, Kochi National College of Technology, Japan
source: http://sun.kochi-ct.jp/e/observatory.html
Source unknown
Thank you!