[time-nuts] Need Time Help
mark at alignedsolutions.com
Wed Oct 5 13:17:04 EDT 2016
In practice I'm not convinced the timing requirements for the JT modes in question are even more than a single order of magnitude more severe than the when I have been timing 15 second sequences on my wrist watch during manual non computer aided weak signal operations. To recap if some one has data or direct personal experience to make the case that extreme levels of timing accuracy will help I'd be interested in seeing this.
That being said I do believe it makes sense to fully use what ever timing resources one has access to.
All the best
Sent from my iPhone
> On Oct 5, 2016, at 9:47 AM, Wes <wes at triconet.org> wrote:
> If you are working "real" EME where you, and not a computer plus lookup table, are coping the signals, none of these precise timing issues exist.
> Wes N7WS
>> On 10/5/2016 6:18 AM, Peter Torry via time-nuts wrote:
>> I must admit to being rather puzzled at the sub microsecond timing requirement as I use ntp to set the W7 clock in my computer and have not had any issues. In fact less than one second is OK for the usual two minute periods that are required to allow for the Faraday rotation. Although I use a GPSDO for a frequency reference I find JT software reasonably tolerant of frequency. As I may be missing something I would welcome observations on how important the period timing requirement is, you never know I might get more contacts.
>>> On 05/10/2016 12:50, Graham / KE9H wrote:
>>> For the group. This ham is trying to work EME. Earth-Moon-Earth propagation
>>> path. Aka, "moonbounce."
>>> He is trying to time synchronize a system, where the other station he is
>>> with can be any other place on the Earth that can also see the Moon.
>>> So the system time sync is for a little bit tougher case than a local area
>>> --- Graham
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