Hello all,
As part of my radioastronomy job, I'm being asked to devise a low-cost
pulsar detection machine for very high frequencies (~80 GHz), which
requires many tens of hours of integration time staring at the pulsar
while maintaining absolute timing accuracy of ~50 microseconds.
I have GPS time and a maser available for absolute and relative timing
respectively. I expect to be taking the data via a low-cost A/D card
clocked by the maser at about 100 us per sample. I plan to use RTLinux
unless I can be convinced there's a better way, as I already use
RT-Linux successfully for our various spectrometers.
My question is: What's a good way to synchronize the RT-Linux OS clock
to the GPS clock? I am considering the use of the A/D card's interrupt
with the 1PPS from GPS. I expect to use NTP to get the correct second.
Does NTP provide a way to tie an interrupt from some user-provided
hardware to sync up the fast clock to ~50 microsecond accuracy, or is
there some other method?
Thanks in advance for any help.
_______________________________________________
time-nuts mailing list
[email protected]
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
