Hi all! First let me introduce myself: I am a time nut since 1996 (former admin of a stratum 2 server: bug.fe.up.pt) but college and other priorities kept me away from my obsession.
The other day I happened to buy a Garmin 18 LVC unit and installed it in the roof in my company. It has been working great and it handled the hot days of August quite well. It shares it's time with the entire network through NTP. Here it is: tick# ntpq -pn remote refid st t when poll reach delay offset jitter ============================================================================== *127.127.20.0 .GPS. 0 l 1 16 377 0.000 0.010 0.004 10.0.2.9 .GPS. 1 u 4 16 377 0.161 0.012 0.007 194.117.9.130 194.117.9.129 2 u 33 64 377 14.810 1.154 0.886 194.117.9.136 194.117.9.138 2 u 62 64 377 14.307 -2.253 3.324 193.136.5.7 193.136.250.246 2 u 18 64 377 11.719 1.549 0.811 193.136.5.15 193.136.250.246 2 u 43 64 377 15.922 1.166 0.819 178.79.160.159 217.20.44.6 2 u 51 64 377 43.315 -0.816 0.666 BTW, it's an embedded machine (ALIX 1D) running FreeBSD 7.4 out of a Compact Flash card. I am looking at other stratum 2 servers to see if my time is off. I also added another stratum 1 server (tock, 10.0.2.9) using the same FreeBSD/CF configuration but on a more powerful machine (an old server laying around). This time I used a Sure GPS Evaluation Board. Here it is: tock# ntpq -pn remote refid st t when poll reach delay offset jitter ============================================================================== o127.127.20.0 .GPS. 0 l 6 16 377 0.000 -0.009 0.001 10.0.2.10 .GPS. 1 u 3 16 377 0.176 -0.015 0.004 194.117.9.130 194.117.9.138 2 u 29 64 377 14.458 0.837 2.336 194.117.9.136 194.117.9.138 2 u 22 64 377 14.073 -2.361 2.371 193.136.5.7 193.136.250.246 2 u 20 64 377 12.425 1.420 0.377 193.136.5.15 193.136.250.246 2 u 26 64 377 16.594 1.651 0.924 178.79.160.159 217.20.44.6 2 u 23 64 377 44.289 -0.722 1.819 I've also installed, at home, a FreeBSD machine (same software as before) but this time I hooked it with a Motorola Oncore UT+ (great unit by the way) and configured it to resolve only time (averaged the antenna location for 24 hours). This machine is also running NTP: oncore# ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== oGPS_ONCORE(0) .GPS. 0 l 12 16 377 0.000 0.002 0.001 canon.inria.fr .GPSi. 1 u 30 64 377 56.218 3.469 0.261 ptbtime1.ptb.de .PTB. 1 u 23 64 377 65.395 0.225 0.355 ntp.inrim.it .CTD. 1 u 7 64 377 50.840 0.185 0.314 ntp02.oal.ul.pt 194.117.9.138 2 u 61 64 377 10.703 -0.811 2.863 ntp04.oal.ul.pt 194.117.9.138 2 u 46 64 377 10.361 -3.673 0.401 Router7.Lisboa. 193.136.250.246 2 u 17 64 377 8.313 -0.189 0.390 Router15.Porto. 193.136.250.246 2 u 65 64 377 13.052 0.040 0.280 li298-159.membe 217.20.44.6 2 u 64 64 377 40.719 -2.208 0.385 The Oncore machine has the antenna indoors (near the window) and after looking at the clockstats file I have this oncore# /var/tmp/sats.sh 8 satellites: 0 7 satellites: 0 6 satellites: 870 5 satellites: 7941 4 satellites: 7313 3 satellites: 6385 2 satellites: 575 1 satellites: 0 The machine has been running for 6 hours and it has been seeing a good number of satellites for most of the time. Do you think I should buy an external antenna like this one: http://www.ebay.co.uk/itm/Panasonic-NAis-VIC-100-TNC-Timing-GPS-L1-Active-Antenna-/180721168817?pt=LH_DefaultDomain_0&hash=item2a13d231b1or my current antenna ( http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=330464866792) is good enough used indoors? Thanks for your help. Cheers, Miguel _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.