Re: [HearSat-L] What time is it, really?

Earl Needham (
Fri, 04 Jun 1999 16:09:37 -0600

At 10:42 AM 6/4/99 -0700, J. Lee Blanton wrote:
>Hello fellow satellite fans:
>The question of "What time is it?" is very important for making accurate
>satellite observations but isn't very easy to answer.  I've seen ads for
>so-called "atomic clocks" that are available from Radio Shack and elsewhere
>which are synchronized with low frequency time signals.  Many of these
>don't even have a 'seconds' display or can't be set to UTC.  Does anyone
>know of a really good one suitable for satellite observations?  An accuracy
>of 0.1 second or better would be nice.  I'd appreciate any advice.  Thanks.

	Well -- a GPS works pretty well, if within one second will work.  That's about the delay you can expect when reading the NMEA sentences from the data port.


Earl Needham, KD5XB    mailto:KD5XB@AMSAT.ORG
Clovis, New Mexico	DM84jk N34d 25.446 W103d 12.700 (or so)