n1 is a stratum 1 server steered by pair of GPS receivers.
n1 exists because I need a reliable source of time. One where I know it'll either give correct time, or be honest and say it is unsynchronized. I've been burned one time too many.

2020.10.22: New serial card
The server is suffering resets in the primary GPS receiver. I have replaced the receiver, the line driver, the cable, and I still have the resets. So, in went a new serial card, timer-capture module, and power supply for the line drivers on the server end. They are the only things I have not yet replaced. Funny thing, those two cards cost more than the rest of the server. No resets yet, but I will know in a month or two.

Sky view
This is an intensity-graded plot of signal strength, seen both as the usual sky view, and as a south-centered cylindrical projection. Blue indicates that the satellite is excluded from the solution, red that the receiver has lost lock.