[time-nuts] What GNSS module to buy for a good time reference?

[Erik Kaashoek]

Any advice on what GNSS module to buy for a, to be build, time/frequency
reference?
What I understood to look for:
- Saw tooth correction info, e.g. a T module
- Dual channel reception to eliminate ionospheric delay errors
- Module on a PCB with USB and antenna connectors for easy integration
Looking at the data sheets the ZED-F9T and NEO-F10T seem to be good
options. Bare modules are difficult to buy.
I can find a complete module with the NEO-F10T for half the price of a
module with a ZED-F9T
Any reason not to buy the NEO-F10T?
Any other suggestions?
Erik.