How to get high accuracy time on my laptop by GPS modules.

I try to use GPS module with usb as NTP server by :
server noselect
fudge time1 0.035 refid GPS

server prefer noselect
fudge refid PPS
and start gpsd with :
gpsd -n -D 5 /dev/ttyUSB0
but it only has gps value and no PPS value (my device support pps). and this value has a few mileseconds delay. Dose anyone know how to get high accuracy time or pps time from my GPS module?

Do you have Reach M+ or the original Reach module?

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