Wait 'till EXACTLY the Spring Equinox? -John
================== > 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 >> > That just gives the rate. > How are you going to set the actual Sidereal time to better than the > 0.9s that can be deduced from UTC? > > Bruce > > > _______________________________________________ > 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.
