You are probably right. What I discovered was it is the ublox itself that is the problem.
My solution is that at the top of my GR constructor, I disable the gpsd, send a reset command to the ublox, and then reenable the gpsd. So far so good with that approach. On May 2, 2019, at 7:36 PM, Dan CaJacob <dan.caja...@gmail.com<mailto:dan.caja...@gmail.com>> wrote: GPS doesn't like to go back in time. You probably need to reset the almanac and a reboot is doing that. On Tue, Apr 30, 2019, 9:53 AM Jason Matusiak via USRP-users < usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com>> wrote: I've seen this a few times, but I cannot seem to lock it down to any particular reason. While sitting at my desk with a GPS simulator (so I have a known good signal), I will be doing testing and everything is fine (it seems to be walking around the place where the unit was built). I will turn off the GPS unit for the night and then the next day when I turn it on, I never get a fix. I've seen this numerous times and the only way I can fix it is to reboot the E310. It is like the GPS is getting into a mucked up stated. Data comes streaming through, but it is just the last good signal. I can't figure out a way to reset the GPS without rebooting it, does anyone know of a way? I tried killing and restarting the daemon, but that doesn't seem to do anything. I really think it is the GPS module, but rebooting it everytime I want to run things "just in case." One other weird thing, when I run gpsmon in this screwed up state, it mostly looks OK, but it has weird characters displayed throughout the ASCII heading (for lack of a better term). This is a good setup on a different unit (so I don't expect to see a fix): tcp://localhost:2947 u-blox> ┌──────────────────────────┐┌─────────────────────────────────────────────────┐ or":11} │Ch PRN Az El S/N Flag U ││ECEF Pos: +6378137.00m +0.00m +0.00m │ er":"u-blox","subtype":"Unknown","activated":"2018-10-10T06:21:07.701Z","flags":1,"native":1,"bps":9600,"parity":"N","stopbits":1,"cycle":1.00,"mincycle":0.25}]} │ 0 1 0 165 0 0110 ││ECEF Vel: +0.00m/s +0.00m/s +0.00m/s │ false,"timing":false,"split24":false,"pps":true} │ 1 2 0 165 0 0110 ││ │ │ 2 4 0 165 0 0110 ││LTP Pos: 0.000000000° 0.000000000° -18.00m │ │ 3 6 0 165 23 0310 ││LTP Vel: 0.00m/s 0.0° 0.00m/s │ │ 4 7 0 165 0 0110 ││ │ │ 5 9 0 165 23 0310 ││Time: 0 00:00:00.00 │ │ 6 14 0 165 22 0310 ││Time GPS: Day: │ │ 7 19 0 165 22 0310 ││ │ │ 8 20 0 165 21 0310 ││Est Pos Err9999998.72st Vel Err 0.00m/s │ │ 9 21 0 165 0 0110 ││PRNs: 0 PDOP:100.0 Fix 0x00 Flags 0x40 │ │10 22 0 165 0 0110 │└─────────────────── NAV_SOL ─────────────────────┘ │11 23 0 165 0 0110 │┌─────────────────────────────────────────────────┐ │12 24 0 165 0 0110 ││DOP [H] 100.0[V] 100.0[P] 100.0[T] 100.0[G] 100.0│ │13 28 0 165 23 0310 │└─────────────────── NAV_DOP ─────────────────────┘ │14 30 0 165 0 0110 │┌─────────────────────────────────────────────────┐ │15 136 0 165 0 0110 ││TOFF: > 1 day PPS: │ There are lines around the different sections (they look like lines, not dashes and bars). and then on the unit that is hosed: tcp://localhost:2947 u-blox> lqqqqqqqqqqqqqqqqqqqqqqqqqqklqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk or":11} xCh PRN Az El S/N Flag U xxECEF Pos: -2414806.17m +5389584.51m +2400650.28m x er":"u-blox","subtype":"Unknown","activated":"2019-01-08T14:52:40.454Z","flags":1,"native":1,"bps":9600,"parity":"N","stopbits":1,"cycle":1.00,"mincycle":0.25}]} x 0 2 0 165 50 0700 xxECEF Vel: +0.00m/s +0.00m/s +0.00m/s x false,"timing":false,"split24":false,"pps":true} x 1 4 0 165 50 0700 xx x x 2 5 0 165 50 0700 xxLTP Pos: 22.2557151134f 114.134790532f 20.19m x x 3 8 0 165 0 0100 xxLTP Vel: 0.00m/s 0.0f 0.00m/s x x 4 9 0 165 50 0700 xx x x 5 10 0 165 50 0700 xxTime: 61 06:13:40.00 x x 6 12 0 165 50 0700 xxTime GPS: 1877+529282.000 Day: 6 x x 7 13 0 165 50 0600 xx x x 8 17 0 165 50 0700 xxEst Pos Err2238690.24st Vel Err 0.00m/s x x 9 20 0 165 50 0700 xxPRNs: 0 PDOP:100.0 Fix 0x00 Flags 0xdc x x10 23 0 165 50 0700 xmqqqqqqqqqqqqqqqqqqq NAV_SOL qqqqqqqqqqqqqqqqqqqqqj x11 24 0 165 0 0110 xlqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk x12 27 0 165 50 0700 xxDOP [H] 100.0[V] 100.0[P] 100.0[T] 100.0[G] 100.0x x13 28 0 165 50 0700 xmqqqqqqqqqqqqqqqqqqq NAV_DOP qqqqqqqqqqqqqqqqqqqqqj x14 129 127 51 0 0110 xlqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk x15 xxTOFF: > 1 day PPS: x mqqqqqq NAV_SVINFO qqqqqqqqjmqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj Not that instead of lines, I see characters. What is up with that???? _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com<mailto:USRP-users@lists.ettus.com> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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