[time-nuts] PP2S

[Tom Van Baak]

Some GPSDO have both a 1PPS and a PP2S (pulse per 2 second) output. I have two questions for one of you telecom experts: 1) What is the history, and the purpose of that PP2S signal? 2) What is the official spec for which second the PP2S lands on? Is it odd seconds or even seconds? Is it GPS time (easy) or UTC (problematic)? If UTC, what happens after a leap second?

Thanks,
/tvb