EUHOUMW Internet Educational Solar Radio Telescope This project

EU-HOUMW Internet Educational Solar Radio Telescope This project has been funded with support from the European Commission. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein. EU-HOUMW training session Limassol, Cyprus December 6 -7, 2011 Cezar LEŞANU Research Assistant Astronomical Observatory-Planetarium Compartment University “Ştefan cel Mare” of Suceava, Romania www. usv. ro

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 Source: www. nrao. edu www

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 telescope using on the shelf Satelite TV Ku-band equipment Offset TV satellite dish Data acquisition board Computer + data logging software LNB Power Supply Analog satellite finder (modified) 14 -18 V DC

Detect microwaves emitted by the Sun and approximate the temperature at ~11 GHz (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 controller Block diagram TVSat dish + Ku band LNB Az-El antenna rotator YAESU G 5500 External IP camera RF signal ~1 GHz Digital comands Embedded server Analog position feedback Internet User interface

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/Sun. View/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 11 GHz (10 min 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

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Thank you!