Need Time Help
Lady Heather has support for setting the system clock from the GPS receiver. The next release has support for analyzing and compensating for the GPS / system / com port message delay. It does not use the 1PPS signal.
It can get the Windoze clock to under 40 msecs (two times the typical Windoze 16 msec clock interval). It can reset the system clock on command, periodically, or whenever the GPS time and system time diverge by more than x milliseconds. However it does not have the finesse of NTP that guarantees on monotonically increasing system clock... it just "jam syncs" the clock to the GPS time. I know there are people using it for EME work in the field where there is no net connection available for NTP, etc.
Plus the next release can give you the moon az/el/phase/age/ rise+transit+set times and draw a pretty picture of the moon at its current az/el and give you your location in Maidenhead, UTM, NATO, etc coordinates.
Mark,
Do you have a likely date for the availability of the new release (other than RSN)?
Cheers
Dave
-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Mark Sims
Sent: 04 October 2016 18:40
To: time-nuts@febo.com
Subject: [time-nuts] Need Time Help
Lady Heather has support for setting the system clock from the GPS receiver. The next release has support for analyzing and compensating for the GPS / system / com port message delay. It does not use the 1PPS signal.
It can get the Windoze clock to under 40 msecs (two times the typical Windoze 16 msec clock interval). It can reset the system clock on command, periodically, or whenever the GPS time and system time diverge by more than x milliseconds. However it does not have the finesse of NTP that guarantees on monotonically increasing system clock... it just "jam syncs" the clock to the GPS time. I know there are people using it for EME work in the field where there is no net connection available for NTP, etc.
Plus the next release can give you the moon az/el/phase/age/ rise+transit+set times and draw a pretty picture of the moon at its current az/el and give you your location in Maidenhead, UTM, NATO, etc coordinates.
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From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Mark Sims
Lady Heather has support for setting the system clock from the GPS receiver.
The next release has support for analyzing and compensating for the GPS /
system / com port message delay. It does not use the 1PPS signal.
It can get the Windoze clock to under 40 msecs (two times the typical
Windoze 16 msec clock interval). It can reset the system clock on command,
periodically, or whenever the GPS time and system time diverge by more than
x milliseconds. However it does not have the finesse of NTP that guarantees
on monotonically increasing system clock... it just "jam syncs" the clock to
the GPS time. I know there are people using it for EME work in the field
where there is no net connection available for NTP, etc.
Mark,
You may be able to do much better than 40 ms if you can use the recent
GetSystemTimePreciseAsFileTime function.
https://msdn.microsoft.com/en-us/library/windows/desktop/hh706895(v=vs.85).aspx
What I do in my own software is to define a function named like:
GetSystemTimePrecise and code that so that when running on Win-8 and later
it uses the new function and when on earlier Windows it uses the earlier
GetSystemTimeAsFileTime. NTP uses this function and it works extremely
well.
Cheers,
David
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv