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Groups > comp.os.linux.misc > #79199
| From | rbowman <bowman@montana.com> |
|---|---|
| Newsgroups | comp.os.linux.misc, alt.comp.os.windows-11 |
| Subject | Re: GPS Based Speedometers |
| Date | 2025-12-15 19:55 +0000 |
| Message-ID | <mqb7d6F50jhU1@mid.individual.net> (permalink) |
| References | (20 earlier) <SkednTQAHeyrQqr0nZ2dnZfqn_sAAAAA@giganews.com> <slrn10jg6j3.iacq.lars@cleo.beagle-ears.com> <10h97bp$r51r$1@dont-email.me> <10hm97v$10iov$1@dont-email.me> <vKacnZce1J5KBaL0nZ2dnZfqnPWdnZ2d@giganews.com> |
Cross-posted to 2 groups.
On Mon, 15 Dec 2025 00:12:46 -0500, c186282 wrote: > OLD GPS ... one-second refresh intervals and dead zones. More modern > GPS, one-tenth-second is common. Speed is very accurate, position is > now typically around eight feet (can tell which traffic lane you're > in) or better, altitude ... more iffy. The gpx files from my Amazfit watch are at 1 second intervals, at least for the 'walking' activity. I should check to see if it's bumped up for cycling although 1 second would be adequate for 20 mph speeds. Eight feet might be optimistic if it's not a dual band receiver picking up the L5 data. My first GPS, a Garmin II, was from before Clinton removed selective availability in 2000. 100m was typical. In the Arizona desert the section markers are small medallions driven into the ground. Being short on trees there aren't any of the helpful markers. I'd find one and try to extrapolate a course to the next. Good luck with finding a 6" marker in the creosote bush. The smallest distance on the GPS was .1 mile. https://www.spirent.com/blogs/selective-availability-a-bad-memory-for-gps- developers-and-users I did my first two geocaches with it, with a lot of hunting around. After finding one a woman I worked with came up the trail, heading directly toward the cache, and calling off the feet to target. I decided it was time for an equipment upgrade.
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Re: GPS Based Speedometers Daniel70 <daniel47@nomail.afraid.org> - 2025-12-14 23:06 +1100
Re: GPS Based Speedometers "Carlos E.R." <robin_listas@es.invalid> - 2025-12-14 13:43 +0100
Re: GPS Based Speedometers rbowman <bowman@montana.com> - 2025-12-14 19:09 +0000
Re: GPS Based Speedometers c186282 <c186282@nnada.net> - 2025-12-15 00:12 -0500
Re: GPS Based Speedometers rbowman <bowman@montana.com> - 2025-12-15 19:55 +0000
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