A couple of comments. If loran c, I built the simulator for the transmitter and its available at this website Index of /simloran <http://n4iqt.com/simloran/> But I left out various wave shaping filters because there was no intent to xmit on the air. KISS principal after all its all of $29 maybe. But is very optimized to preserve the accuracy of the 100kc signal and I did check its behaviors with the real loran stations it matched very well. Those filters also optimize ground and skywave propagation characteristics not a problem when the feed is coax and the endpoint the receiver.
Good comments on spreadspectrum. I have to roll back up to the question asked a while ago. Goals of the interest. From there what frequency might be chosen and what method of delivery. Regards On Tue, Oct 5, 2010 at 6:32 PM, Magnus Danielson <[email protected] > wrote: > On 10/05/2010 03:17 PM, J. Forster wrote: > >> Hi >>> >>> The bandwidth of anything close to a Loran signal is a *lot* wider than >>> any of the ham bands contemplated below 1 MHz. >>> >>> There's the minor issue of getting the power company to put in a cable to >>> the house for your 1 Mw (capital M not lower case M) transmitter. >>> >> >> I was not contemplating a global navigation system. Just enough to get a >> LORAN type timing, not navigation, lock over a few hundred mile radius. >> > > However, consider that a few of these transmitters if wisely used could be > kept running by guys like us on electricity bills we could handle and > provide a grid network. This way the navigation aspect could be embedded > into the system and propagation delay be cancelled. Fixed location could > then be used to provide multiple observations of time-indication. > > A particular aspect of spread spectrum is that we could have several > transmitters on the same center frequency which has the benefit that > equipment delays become common mode to a first degree. This is a benefit of > GPS over GLONASS. > > Multiple carrier systems provide means for frequency diversity as well as > dispersion observations. > > There is many options to consider for such a system. > > Cheers, > Magnus > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
