VLBI guys usually have a local H1 maser clock, they go through a complex synchronization ritual prior to the start of observations. H1 masers have short-term stability on the order of 1e-16.
GPS synchronization would be a *starting point* for such things. On 2016-04-01 08:42, madengr wrote: > What would it take to get phase coherency, say at 1 GHz, on a global scale; > short of running cables? I assume with a moderate priced GPSDO one can get > 10E-12 stability, so that would be 0.01 Hz frequency stability at 1 GHz. > Does that mean you can integrate for 10 seconds and stay within 0.1 radian > phase drift? > Lou > > Marcus D. Leech wrote > >> Since those stations would likely not be phase-coherent, then any spectra >> adding would only improve sensitivity by sqrt(N)--you don't get to >> effectively use the sum of the effective apertures of the individual >> stations. > > -- > View this message in context: > http://gnuradio.4.n7.nabble.com/radio-astronomy-fast-radio-burst-help-requested-tp59287p59297.html > [1] > Sent from the GnuRadio mailing list archive at Nabble.com. > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio [2] Links: ------ [1] http://gnuradio.4.n7.nabble.com/radio-astronomy-fast-radio-burst-help-requested-tp59287p59297.html [2] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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