Hi Depending on exactly how the 59309 works, you might do better by chopping into it and feeding it with a micro that added an extra pulse every so often. That would allow you to stick some math in-between a UTC pps source and your clock. Let the micro go get all the magic numbers from USNO and keep everything "right".
Bob On Jan 14, 2010, at 10:12 PM, Brian Kirby wrote: > I would like to have an electronic clock to keep sidereal time. I am > planning on using a HP 59309A, which can except an external clock of 1/5/10 > Mhz. > > According to Wikipedia sidereal time is 23 hours 56 minutes and 4.091 seconds > - a total of 86,164.091 seconds > > So 86,400 seconds for a normal "atomic defined" day divided by 86,164.091 = > 1.002,737,903,89 > > If I set the 59309A to 10 Mhz external clock and dial a synthesizer up to > 10.0273790, the unit should be able to keep sidereal time. > > Is my math and theory correct ? > > Brian - KD4FM > > _______________________________________________ > 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.
