Trigger off of an exact time

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.

[Geoff Hayes]

Nate - where are you hoping to get the GPS time from? A sensor? A data file?

[Nate Melster]

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

[dpb]

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.