Vicchio ha scritto:
Ricevitore radio? Interessante...

su che frequenze si ascoltano? Con antenne direttive od omnidirezionali?
La frequenza migliore è sui 10 metri ma credo che in Italia ci siano problemi a riceverla.
Direzione: non le ho mai osservate in radio, quindi non sono sicuro di quanto scrivo sotto.
Credo che si osservano principalmente Est-Ovest, in alternativa ci si sintonizza sulla frequenza di una stazione lontana, diciamo almeno 1.000 km e si ascolta, quando una meteora taglia casualmente
la congiungente trasmittente-ricevente si crea un momentaneo ponte radio di aria ionizzata che aumenta temporaneamente la ricezione del segnale.
Considerate che la maggior parte degli sciami ha il radiante meglio posizionato (più alto in azimuth) durante l'aurora avanzata, se non a Sole già sorto, quindi sarebbero meglio visibili nelle bande radio che nel visuale.
Per gli astrofili radioamatori vi rigiro un messaggio che ho ricevuto:
Hi there,
The Perseids are already coming back! The maximum of activity of the meteor shower is planned for 12-13 of August. The full Moon is on 7 August so conditions will not be optimal for visual observations. In this case radio observations are even more important.
This year we would like to be able to produce an activity curve for one station by August 15. This is very challenging and for that we will need the help of many of you!
One day of data consists of approximately 300 images. Each of them needs to be analyzed by 10 different users. We will provide images from 11 to 13 of August, one day at a time. So to obtain an activity curve on August 15, we will need about 9000 classifications in 3 days. If e.g. 1000 users are participating, that will be 9 classifications per user on average, or 3 images classified per day. Of course the more users the better!
Data will be released on 12, 13 and 14 of August as we need to collect and prepare them for upload to the RMZ website. Meanwhile you can also help us by analyzing data from the same station obtained on 22 and 23 of July, during days when the Perseids were not active at all. If these data are fully processed before the meteor shower, we will then be able to also subtract the background from the total activity. That is the ultimate goal for August 15.
We hope to "see" as many of you as possible on August 12-14 and that between two classifications, you might also be able to spot a few shooting stars at your location

Get involved again at
http://www.zooniverse.org/projects/zoon ... meteor-zoo.
Thank you in advance!
Hervé and the Radio Meteor Zoo team
Ciao.
Roberto Gorelli