Turbulence on demand

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Central supercomputer. Fibre data ... Test station around Växjö, southern Sweden ... Courtesy and © M. J. Padgett, J. Leach et al., U. Glasgow, UK; Royal Society ...
LOFAR Outrigger in Scandinavia

Physics in Space Programme

The LOIS space radio research facility Description and first results B. Thidé Swedish Institute of Space Physics, Uppsala, Sweden and LOIS Space Centre, Växjö University, Växjö, Sweden

XXVIII URSI GA, New Delhi, 23-29 October, 2005 GHJ, Novel ground-base radio techniques for studying the sun-earth plasma environment, 25 Oct, 12:40-15:00

New HF-VHF digital radio systems for space physics LOFAR Low Frequency Array (10–240 MHz) Test station at Exloo operational 2004, full scale deployment in progress. Final antenna 10–100 times more sensitive than any existing comparable facility

LOIS LOFAR In Scandinavia Test station near Växjö operational 2004, fast fibre network, supercomputer 2005 Transmitter in Hörby (Teracom) Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

LOFAR Phase 1

Central supercomputer

- Radio telescope - Seismic imager - Precision weather for agriculture, wind energy

Fibre data transport Sensor field

Integrate LOFAR network into regional fibre network, sharing costs with schools, health centres etc.

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

LOFAR Phase 2 into Lower Saxony, Schleswig-Holstein, Nordrhein-Westfalen

Ultimate LOFAR to Växjö SE Cambridge UK Potsdam DE Nançay FR etc

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

LOIS – The LOFAR Outrigger in Scandinavia Test station around Växjö, southern Sweden A total of 32 LOIS stations are planned

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

Three orthogonal linear dipole antennas probe the 3D electric field vectors

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

Three orthogonal loop antennas probe the 3D magnetic field pseudovectors

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

LOIS Test Station control room (Risinge)

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

LOIS resources Supercomputer cluster (SUR grant from IBM) and Part of the LOIS Test Station outside Växjö, SE.

Lars Daldorff, Axel Guthmann and the IBM system Bo Thidé (paper given by Tobia Carozzi)

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B.T. and Willem Baan (LOFAR) at the LOIS Test Station. XVIII URSI GA, New Delhi, 23-29 October, 2005

LOIS transmission tests Test transmissions (ionospheric interactions, space radar) will be made with Radio Sweden’s 500kW HF transmitters and logperiodic antennas at Hörby, 200 km south of the LOIS test station. Will try to include other highpower HF transmitters in Europe.

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

From Paul Rodriguez

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

From Paul Rodriguez

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

Solar Phys., in press

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

EM beam with spin (circular polarisation) No orbital angular momentum (OAM)

Courtesy and © M. J. Padgett, J. Leach et al., U. Glasgow, UK; Royal Society Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

Field vectors across an antenna array for a radio beam with spin (circular polarisation)

Phase 0 deg

Phase 45 deg B. T. et al., preprint, 2005

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

Helical radio beams carry orbital angular momentum (OAM)

B. Thidé et al., preprint, 2005 Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

Field vectors across an antenna array for a radio beam with orbital angular momentum

Phase 45 deg

Phase 0 deg B. Thidé et al., preprint, 2005 Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

EM beams with orbital angular momentum (OAM) l=+1

l=+3

l= -4

Courtesy and © M. J. Padgett, J. Leach et al., U. Glasgow, UK; Royal Society Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

LOIS 3D vector radio measurement videos (Click for animation)

Power spectral density

Polarisation rollogram

Intensity and Fröbenius norm Bo Thidé (paper given by Tobia Carozzi)

Dynamic variation of polarisation ellipse 21

XVIII URSI GA, New Delhi, 23-29 October, 2005

LOIS 3D vector radio measurements (cont’d)

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

Cosmic ray radio flash candidates at LOIS (Dec 2004)

Latest news: 27 Dec, 2004, magnetar gamma signatures tentatively observed.

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005

OAM as an efficient turbulence diagnostic

Bo Thidé (paper given by Tobia Carozzi)

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XVIII URSI GA, New Delhi, 23-29 October, 2005