That time is after the survey and a few days before the closing after you both have had time to review the survey and get estimates. Be prepared to spend a lot of time on the phone renegotiating prior to closing. 14) Keep your mouth shut and smile a lot at the closing.

I personally can relate to the problem of not having a written estimate even though the work was perfromed from what is suppose to be a reputable yard. Gil

Dear John Marshall: Your comments below, are they your estimates or your actual experience? I'm a financial planner and have worked with boat owners who have taken their boats on extended cruising (1-5 years). Only one had to tap into his capital to maintain his boating lifestyle.

The original drift estimate was 35ns per second (not 0.35ns). And here are some observations on the gpsdo firmware pps tracking: There is a 40 MHz VCO (i.e. VCTCXO) that is tuned to match PPS's (or an external 10MHz that appears to not be an option on the E310).

If you want to be a bit more advanced, you would use the receivers estimate of positional error as an input to the continously running Kalman filter. Kalman filters excell over PLLs in acheiving stable locks (as in creating a lower ADEV curve on the output of the locked oscillator).

> ntptime ntp_gettime() returns code 0 (OK) time cc1d84fd.0fbd3800 Tue, Jul 8 2008 6:17:33.061, (.061481758), maximum error 1480 us, estimated error 15 us, TAI offset 0 ntp_adjtime() returns code 0 (OK) modes 0x0 (), offset -0.014 us, frequency -0.040 ppm, interval 1 s, maximum error 1480 us, estimated error 15 us, status 0x2001 (PLL,NANO

TCOXs use less power but maybe > hours and not days of hold over time is enough. > > The LED's color depends on the estimated timing error, NTP is good at > computing that based on if GPS is connected and working, the network > status and so on.

Filtering will also effect systematic signals, but you should never use ADEV for such noises, it's a bad estimator for them. Cheers, Magnus On 10/23/2014 02:42 AM, Bob Camp wrote: > Hi > > The more you “curve fit” or “average” the more you are filtering the data. Filtering does indeed impact the ADEV both at short tau’s and longer tau’s.

error 1 us, TAI offset 35 ntp_adjtime() returns code 0 (OK)   modes 0x0 (),   offset 0.000 us, frequency -17.209 ppm, interval 256 s,   maximum error 2000 us, estimated error 1 us,   status 0x2107 (PLL,PPSFREQ,PPSTIME,PPSSIGNAL,NANO),   time constant 4, precision 0.001 us, tolerance 500 ppm,   pps frequency -17.207 ppm, stability 0.004 ppm, jitter 0.507 us,

I keep going back to the CNS clock because although its frequency fluctuations are more severe, I find it's easier to visually estimate tweak amounts. My desire is to maintain an Rb within 10 PPT most or all of the time with little or no manual attention.