Questions tagged [gps]
19 questions
1
vote
1 answer
Access NMEA reference clock and GPS position simultaneously
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…
![](../../users/profiles/249773.webp)
wenzul
- 215
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0
votes
0 answers
querying data from NTP in ubuntu using socket
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; //…
![](../../users/profiles/499365.webp)
debonair
- 101
- 3
0
votes
1 answer
Do NTP pool servers use gpsd?
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…
![](../../users/profiles/413839.webp)
Spencer
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- 8
-4
votes
1 answer
Ping latency vs location on a map (x kilometer of a trip) | ping-latency vs distance
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…
![](../../users/profiles/275199.webp)
sirkubax
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