So if I read the excel correctly you only actually need 1 system. Say H0 is the master then the delays for H1-X is how far away from the master the pulse would be. More importantly you would only need 2 other of the Hs to create a navigational fix. Is this a correct interpretation? Have to go dig out of the snow.
On Sat, Jan 8, 2011 at 10:35 AM, Magnus Danielson < [email protected]> wrote: > John, > > > On 08/01/11 16:08, J. Forster wrote: > >> Pondering some more on this, doing some calculations (spread-sheets) the >> actual scheme emerge... the range of 0 to 7 is not selected by accident. >> > > I had essentially the same spread sheet... > > However, how would you be able to achieve simplicity of design by being > true to the PRI/PRR given or to what seems like reasonable counter based > solution. Notice that the ARN-4 has a "Crystal phasing" control to adjust > the crystal frequency of the receiver so that the receiver will align up to > the actual rate of the master station. > > I think the PRI/PRR given is a presentation simplification rather than true > numbers. Considering that absolute frequency was not a requirement, the > repetition rate of the master needs to be sufficiently stable for > distinction of station and the receiver to make stable reading, in presence > of other stations. > > That LORAN-C uses GRI indications with repetition rate in microseconds, and > fairly even such numbers as well, is another hint. > > Thus, I view the PRI/PRR ratios as approximations at best, a matter of > presentation rather than actual nominal rates. > > 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.
