PPS_INTMIN
ntpdata->pps_jitter += (jitter - ntpdata->pps_jitter) >> PPS_INTMIN;
ntpdata->pps_shift = PPS_INTMIN;
if (ntpdata->pps_shift > PPS_INTMIN) {
NSEC_PER_USEC) - ntpdata->pps_stabil) >> PPS_INTMIN;