What is BRAMS?
BRAMS (Belgian RAdio Meteor Stations) is a set of radio receiving stations using forward scattering techniques to study the meteoroid population. The project is coordinated by the Belgian Institute for Space Aeronomy (BISA), in the frame of the Solar-terrestrial Centre of Excellence (STCE). Most stations will be run by Belgian radioamateurs or groups of amateur astronomers. Two dedicated beacons located in Ieper (Western Belgium) and Dourbes (Southern Belgium) act as transmitters.
The main goals of this project are:
- To collect and standarise the meteor observations of all the stations.
- To write codes for automatic detection of underdense/overdense meteor echoes.
- To compute meteoroid flux densities for meteor showers and mass indexes for meteor showers and sporadic meteors.
- To determine individual meteor trajectories from observations of the same meteor by multiple stations (both shower meteors and sporadic ones)
- To determine orbital parameters of multi-station meteoroids
- To analyse meteor profiles in order to retrieve physical parameters such as ionization, speed and mass of the meteoroids
- To study head echoes and the so-called "epsilon" echoes
- To promote radio-observation of meteors.
In September 2010, we installed a beacon at the Geophysical Center of Dourbes which belongs to the Royal Meteorological Institute of Belgium (RMI). It emits a cw circularly polarized signal at a frequency of 49.97 MHz with a constant power of 150W.
In summer 2013, 24 stations have been equipped with hardware material procured by BIRA-IASB to listen to this new beacon. The material is identical for each station, allowing an easier comparison of the data. A map of the existing stations is available in the menu on the right.
If you are interested to join our effort and present radio-observation of meteors to your visitors, please contact us.
One of our receiving stations is located in the radioastronomical site of Humain which belongs to the Royal Observatory of Belgium (ROB). This station has interferometric capabilities using the 5-antenna design described in Jones & Jones, Radio Science, 33, 55-65, 1998.
With this interferometric system we will be able to measure the directions of the radio meteor echoes with an accuracy of about 1°. This will help us to retrieve individual meteoroid trajectories.
- Johan De Keyser (Operational Director)
- Hervé Lamy (Project Leader)
- Sylvain Ranvier
- Stijn Calders
- Emmanuel Gamby
- Michel Anciaux
- And many radio amateurs!
If you have any questions about this project, please contact Hervé Lamy.