At 6:40 PM +0100 1/17/06, Magnus Danielson wrote: > >But besides that, pulsars are cool. Since the planet is orbiting, a few pulsar >needs to be continously measured and compensation needs to be >performed for the >rotation. Isn't those used for monitoring the UTC deviations in VLBI? > >Cheers, >Magnus
Magnus, I work on the Heinrich Hertz submillimeter telescope on Mt. Graham. We are going to be doing a VLBI run in early April. I just asked our resident VLBI guy what we'll be using for synchronizing our telescope to the others for our upcoming run at ~230 GHz. He said that GPS is used, since it's better than a microsecond and is readily available with no fuss. Each site will have a hydrogen maser for the data clock. These masers are currently being calibrated against each other. Pulsars are nearly invisible at that frequency. We have plans to look for an existing bright pulsar at 80 GHz and expect to need to integrate photons for a week to see it. -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/ _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
