PPS Timing System: From "Why Does This Keep Hanging" to Nanosecond-Level Data
≈ 7.3 ns Receiver-to-receiver jitter (NEO-M8T vs ZED-F9T), with the measurement system noise floor removed in quadrature Overview A follow-up to the VLF recorder work — a parallel project at the Institute characterizing PPS (pulse-per-second) timing accuracy across two GNSS receivers, both running in survey-in mode: a u-blox NEO-M8T and a ZED-F9T. The question was straightforward: How precisely can the PPS outputs of two GNSS receivers be compared, and how much of the measured jitter actually comes from the measurement system itself? ...