alt Hacker NewsYes, either Rb, Cs, or H standards depending on which GNSS system you're using.
For the most critical applications, you can license a system like Fugro AtomiChron that provides enhanced GNSS timing down to the level of a few nanoseconds. There are a couple of products that do similar things, all based on providing better ephemerides than your receiver can obtain from the satellites themselves.
You can get AtomiChron as an optional subscription with the SparkPNT GPSDO, for instance (https://www.sparkfun.com/sparkpnt-gnss-disciplined-oscillato...).
> You can get AtomiChron as an optional subscription with the SparkPNT GPSDO, for instance (https://www.sparkfun.com/sparkpnt-gnss-disciplined-oscillato...).
That's one hell of a healthy profit margin there O.o
The SiTime MEMS oscillator is about 100€ for one single chip, the mosaic-T GPS receiver is about 400€. Add 50€ for the rest (particularly the power input section looks complicated) and 50€ for handling, probably 600€ in hardware cost... sold for 2.500€.
The real money I think went into certification and R&D for a low-volume product - even though most of the hard work is done by the two ICs, getting everything orchestrated (including the PCB itself) to perform to that level of accuracy is one hell of a workload.