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BRAMS, the Belgian Radio Meteor Stations : latest developments Hervé Lamy

BRAMS, the Belgian Radio Meteor Stations : latest developments Hervé Lamy. Hervé Lamy Sylvain Ranvier Emmanuel Gamby Stijn Calders Michel Anciaux Johan De Keyser Yves Geunes. BRAMS team. Radio forward-scattering observations. Wislez et al (1996). . .

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BRAMS, the Belgian Radio Meteor Stations : latest developments Hervé Lamy

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  1. BRAMS, the Belgian Radio Meteor Stations : latest developments Hervé Lamy

  2. Hervé Lamy Sylvain Ranvier Emmanuel Gamby Stijn Calders Michel Anciaux Johan De Keyser Yves Geunes BRAMS team

  3. Radio forward-scattering observations Wislez et al (1996)  

  4. Network of 22 radio receiving stations + Jean-Louis • Future stations : • Genk • Leuze • Oostende • Seneffe • Lille

  5. A typical receiving station AGC switched off

  6. Spectrograms Data saved in WAV files, sent to BISA by USB sticks and archived

  7. The BRAMS viewer (1)

  8. The BRAMS viewer (2)

  9. The BRAMS viewer (3)

  10. The BRAMS viewer (4)

  11. From multi-stations observations of the same meteor Meteor path must be tangent to a set of ellipsoids whose focii are the transmitter T and the various receiving stations Ri (Nedeljkovic 2006) Determination of trajectories

  12. Student from ULB « Direct » problem : find the position of specular point knowing positions of T, Ri and meteor path + calculate t « Inverse » problem : among « all » possible meteor paths, find those who are tangent to a number of ellipsoids knowing T and Ri many many solutions ….decreases slowly with number of stations. To be done : take into account the real t observed (difficulty : be sure we’re talking about the same meteor..) Determination of trajectories (2)

  13. Calculation of the OF for meteor showers (see presentation of Stijn Calders and early application to the Draconids 2011) Radio polarisation measurements of meteor trail echoes (see presentation of Sylvain Ranvier and application to the Perseids 2012) Other works in progress

  14. VLF/VHF observations of meteors

  15. Goal : study of meteors, comparison of fluxes with forward & back scatter systems Status : preliminary design done, material is being procured, work should start in spring 2013 Meteor radar in Dourbes

  16. BRAMS : the website http://brams.aeronomy.be

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