Hello Paul, I remember that very nice plot you produced some months ago: http://abelian.org/vlf/tmp/170211b.png How can one produce such a plot from data files produced by vtwrite? Can you advice a c
Hi Stefan Did you get gpsd and ntp working by following Paul's info (email 21/07)? I have a UBlox NEO 7M connected to the RaPi by USB and I can run xgps or cgps and see that the NMEA is being read. B
Hi Terry, Am 06.08.2017 13:07, schrieb Terry G0EZY: Hi Stefan Did you get gpsd and ntp working by following Paul's info (email 21/07)? No, but his advice was an important step forward. I took additio
Hi Stefan thanks for the advice. I also found online those additional steps to stop and disable the gpsd socket and then to start manually. I found a lot of info for using the RaPi as an NTP server i
First use vtread to extract the signal, vtfilter and vtblank to clean it up, and vtnspec to produce the spectrum. vtread -T2017-02-11_13:30,+7h /raw | # Extract signal vtmix -c 0.866/-20,-0.5/-35,-0.
As root or with sudo, killall gpsd to stop the daemon, then have a look to see if the GPS is sending data: stty -F /dev/ttyACM0 -echo cat /dev/ttyACM0 Should give you regular bursts of NMEA messages.
Paul - thanks for advice. Apologies to others as this is a bit OT. Ntp is now running from the gps. However, gpsd still required additional commands to work. This command: sudo gpsd -bnN -D3 /dev/tty
Probably not very OT, I would say most relevant to LF and VLF operation. Getting gpsd and ntpd running opens the way to using coherent signaling and to be able to combine signals from multiple antenn
