Trigger off of an exact time

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Nate Melster 2020-7-28

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https://ww2.mathworks.cn/matlabcentral/answers/571936-trigger-off-of-an-exact-time

编辑： dpb 2020-7-29

I want to trigger to do something at some real time. The idea is to trigger an event within milliseconds of a specific GPS time. I know I can use something like below, but that is not accurate enough.

[year, month, day, Hour, Minute, Second] = datevec(now + (UTC_offset/24) + (Leap_seconds/(24*3600))); % for GPS time

There are sites that 'time.gov' that can give you a more accurate time. How can I get an accurate time in Matlab? I would prefer to get GPS time, but if I do get UTC or local time, I can convert that.

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Nate Melster 2020-7-28

The computer using Matlab is connected online, so I was hoping from something online like a website.

dpb 2020-7-29

编辑：dpb 2020-7-29

You can read the time to whatever precision you wish; you can't control the latency of the connection just over the internet, though. I think msec timing isn't in the cards that way; you would need some direct connection to the time server.

That's NTP and the NIST timeserver link is https://tf.nist.gov/tf-cgi/servers.cgi

Interesting Q? I've not thought about through MATLAB; just used the OS-supplied service; I'd guess passing to it is probably quickest/fastest route.

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