Hi That’s a pretty good example for the “why you don’t do your timescale based on a single brand of gear / single setup” file.
Thanks for sharing!! Bob > On May 21, 2016, at 9:58 PM, Jim Palfreyman <[email protected]> wrote: > > Hi all, > > Awhile back I posted about some mysterious 0.7 ns jumps in three different > masers (of the same brand) at three different locations around Australia. > > Well we think we've found the problem. All three locations also have > in-room air conditioners of the same brand. These are used for cooling > only. When these units turn on, we think they induce a magnetic field from > the inrush current that briefly disrupts the maser. We don't think it's > electrical because moving to another phase did not change things. > > These air conditioners are all quite close to the masers. Typically a metre > or 2 away. > > Much was done to discover this, but the clincher was that when the weather > cooled enough at the southern most location (Hobart), we turned off the air > con (only heating was needed) and the problem vanished. > > So there's a lesson here for all maser owners. The jump of 0.7 nsec is not > much, but it's huge for VLBI and for time-nuts. > > > Jim Palfreyman > _______________________________________________ > 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.
