hola claudio, pues va a ser que no, por mi parte, yo lo de onda larga lo escuchaba a traves de la web esa de la universidad, pero ese segmento lo han quitado, se ve que lo tenian en pruebas y dspues de 5 semanas lo han quitado, por problemas con el ordenador que les hacia de servidor o algo asi.yo lo maximo que puedo bajar es a 150 khz con un escanner y solo en am
lo siento 2009/6/20 Claudio Periolo <[email protected]> > > > Una pregunta..... en 140 khz +- 500 hz escuchas algo? porfa si escuchas una > señal tipo RTTY podrias mandar el audio para comparar si es lo que escucho > algunas veces??? tks Claudio > > --- El *jue 18-jun-09, juan jose <[email protected]>* escribió: > > > De: juan jose <[email protected]> > Asunto: Re: [ondalarga] sabeis que es esto? > A: [email protected] > Fecha: jueves, 18 junio, 2009, 6:58 pm > > ok, muchisimas gracias. no sabia que hubiera un sistema como este en onda > larga. > gracias por vuestra ayuda, e encontrado la web > http://www.datatrak .ws/services_ datanetworks. > asp<http://www.datatrak.ws/services_datanetworks.asp> > <http://www.datatrak.ws/services_datanetworks.asp>que habla del tema > nuevamente gracias > > 2009/6/18 Claudio Periolo <radioclaudio@ > yahoo.com<http://e1.mc521.mail.yahoo.com/mc/[email protected]> > > > >> >> >> Es Datarack. >> Datatrak is a medium-area LF automatic vehicle location (AVL) system >> operating in the UK, Benelux countries, Germany and Austria. It is operated >> by Securicor Information Systems in the UK and by Siemens-Datatrak in >> mainland Europe. It was originally developed to fulfil a need for the >> monitoring of Securicor's own parcel and security vehicles, however it is >> now marketed to a number of other customers. The system is a conventional >> hyperbolic positioning system where a number of stations making up a chain >> transmit in sequence on a common pair of frequencies in the band 130 to 170 >> kHz. The receiver calculates it's position and communicates this back to the >> control centre (Swindon in the UK) by means of a UHF radio system that >> provides similar coverage to the LF network. The system is enhanced by the >> provision of Event Activated Tracking (EAT) or 'Trak Bak' as Securicor call >> the product. This allows a stolen vehicle to be tracked and aprehended. >> Also, the UHF component may monitor various inputs from the vehicle, >> providing a telemetry function. >> There are apparently 14 sites in the UK but their location is unknown. The >> sequential transmissions are clearly audible at around 145 kHz in the UK, >> the interesting thing about them is that they 'warble' as if FSK modulated >> at around 20bps. Using Manchester coding, the transmission would still be >> usable for positioning as long as the phase were averaged over many symbols. >> >> Buscando en listas los vas a encontrar de donde son, si los encuentro lo >> envio. 73's >> Claudio >> >> >> --- El *jue 18-jun-09, juan jose <eb3...@gmail. >> com<http://e1.mc521.mail.yahoo.com/mc/[email protected]> >> >* escribió: >> >> >> De: juan jose <eb3...@gmail. >> com<http://e1.mc521.mail.yahoo.com/mc/[email protected]> >> > >> Asunto: [ondalarga] sabeis que es esto? [2 Attachments] >> A: ondala...@yahoogrou >> ps.com<http://e1.mc521.mail.yahoo.com/mc/[email protected]> >> Fecha: jueves, 18 junio, 2009, 7:23 am >> >> hola, escuchando por la onda larga me e encontrado con esto, sabeis que >> es? >> es en 133,78 y 147,04 khz >> >> saludos >> >> >> ------------------------------ >> >> ¡Obtén la mejor experiencia en la web! >> Descarga gratis el nuevo Internet Explorer 8 >> http://downloads. yahoo.com/ ieak8/?l= >> e1<http://downloads.yahoo.com/ieak8/?l=e1> >> > > > ------------------------------ > > ¡Obtén la mejor experiencia en la web! > Descarga gratis el nuevo Internet Explorer 8 > http://downloads.yahoo.com/ieak8/?l=e1 > > >
