Sep 21, 2005 - Central supercomputer ... 11. LOFAR Initial Test Station (ITS) at Exloo .... Courtesy and © M. J. Padgett, J. Leach et al., U. Glasgow, UK; Royal ...
Physics in Space Programme
LOFAR Outrigger in Scandinavia
LOFAR and LOIS www.lois-space.net Deep space probing at the longest wavelengths for solar physics and space weather Bo Thidé Swedish Institute of Space Physics, Uppsala and Dept. of Astronomy and Space Physics, Uppsala University and LOIS Space Centre, Växjö University Solar Activity Workshop, Lund, 19-21 Sep, 2005
New HF-VHF digital radio system 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
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Hydrogen radiates at 1420.4 MHz (21 cm) Very important source of radiation from space
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
The Westerbork array of 14 dishes, each 25 m in diameter sees nearby 1420.4 MHz (21 cm) objects
M31 (Andromeda, Local group)
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Q1: How to observe 21 cm line radio emission from the Epoch of Re-Ionisation?
M. Rees Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
The cosmological redshift (z~8-10) Doppler shifts the 1420.4 MHz signal into the HF/VHF band!
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
LOFAR
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
LOFAR will be a very sensitive HF/VHF array
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 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
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Solar Activity Workshop, Lund 19-21 Sep, 2005
LOFAR Initial Test Station (ITS) at Exloo
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
First LOFAR ITS results
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 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
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Solar Activity Workshop, Lund 19-21 Sep, 2005
LOIS – The LOFAR Outrigger in Scandinavia
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Three orthogonal linear dipole antennas probe the 3D electric field vectors
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Three orthogonal loop antennas probe the 3D magnetic field pseudovectors
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
LOIS Test Station control room (Risinge)
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 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
B.T. and Willem Baan (LOFAR) at the LOIS Test Station.
Bo Thidé
Solar Activity Workshop, Lund 19-21 Sep, 2005
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Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
LOIS and LOFAR
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 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
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
From Paul Rodriguez
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
From Paul Rodriguez
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
From Paul Rodriguez
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Solar Phys., in press
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
3D vector polarimetry and radio imaging
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
3D polarimetry utilising that E(t,x) is a polar vector and B(t,x) an axial vector (pseudovector)
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Use EM field symmetries and conserved quantities (Noether’s theorem)
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
EM symmetries (continued)
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
EM symmetries (continued)
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 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
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Solar Activity Workshop, Lund 19-21 Sep, 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
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Helical radio beams carry orbital angular momentum (OAM)
B. Thidé et al., preprint, 2005 Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 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
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Solar Activity Workshop, Lund 19-21 Sep, 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
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Solar Activity Workshop, Lund 19-21 Sep, 2005
OAM as turbulence diagnostic
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
OAM as a new RF modulation technique?
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Cosmic ray radio flash candidates at LOIS (Dec 2004)
Latest news: 27 Dec, 2004, magnetar gamma signatures tentatively observed.
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Bo Thidé
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Solar Activity Workshop, Lund 19-21 Sep, 2005
Ultra-High Energy Neutrino Detection on the Moon Oscar Stål J. Bergman, L Åhlén, B. Thidé1 Swedish Institute of Space Physics IRF-U, Uppsala, Sweden 1
also at LOIS Space Centre Växjö, Sweden
DGLR International Symposium To Moon and Beyond Sept. 15-16, 2005 Bremen, Germany Preprint available online: astro-ph/0509210 Bo Thidé
To Moon and Beyond
Solar Activity Workshop, Lund 19-21 Sep, 2005
Oscar Stål
Bremen, sept. 15-16, 2005
LOFAR and LOIS sensors—a summary Sensor type
Applications
HF-antenna:
astrophysics, ionospheric/magnetospheric physics, astro-particle physics cosmology, early Universe solar effects on Earth, space weather ground subsidence micro-climate prediction gas/oil extraction precision agriculture wind energy precision agriculture habitat management public safety
VHF-antenna: Geophones: Weather:
Water:
Infra-sound: Bo Thidé
LOFAR was conceived by the astrophysics community as a new way to build radio telescopes
atmospheric turbulence, meteors, explosions, sonic booms 49
Solar Activity Workshop, Lund 19-21 Sep, 2005
