[time-nuts] Cable delay correction for Tbolt Cs substitude
magnus at rubidium.dyndns.org
Mon Oct 17 21:12:04 EDT 2011
On 10/17/2011 02:28 AM, Mark Sims wrote:
> Yes, at one time there was some very precision surveying antennas that were temperature controlled. I'm not sure if they were just controlling just the preamp or the whole antenna, but I got the impression that they were controlling the temperature everything inside the "radome" package.
> At one time I did some TDR measurements on a piece of coax (I think it was 100 feet of black RG59). The day/night prop time variation was under a nanosecond. Something tells me that the cable delay changes itself won't make any difference.
> Does anyone ever add a temperature controller on the antenna? Maybe that
> should be my next test.
I know that SP in Borås have actually temperature-controlled also their
cable. Not only the pillar and radome.
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