Questions tagged [gps]

I noticed two approaches to get an accurate time from GPS (with PPS). Using ntpd either with NMEA reference clock or Shared Memory Driver My problem: I want to have a very accurate time and access to GPS position data. Therefore using Shared…

I have configured ntp to use gpsd as reference server on my machine. I am querying data from ntp directly, using udp socket. For ip address I use localhost and port_number = 123. Packet structure I use is: typedef struct { uint8_t li_vn_mode; //…

A bug in gpsd upon which some NTP servers rely, has been known for a couple of months, but it hasn't really become general knowledge until recently, just before the October 24, 2021 rollover that may set some NTP servers' clocks back to 2002. A…

Orange is having problem delivering the internet between biggest cities (I'm traveling via train). There are white spots on the way... They do not see the problem, so I thought - lets make a chart ping-latency vs distance (location on map) Do you…