Problem with outdoor running apps tracking speed - HTC Titan

Dear all,
I have tried apps for tracking my outdoor running, with poor results in terms of detected speed profile. Basically it seems that the speed recorded by my HTC Titan is affected by a lot of noise, bouncing up and down even when I am running at quasi-constant speed.
To have a comparison, my friend and I went to run side by side, doing sprints periodically. On my friend's iPhone, you can clearly see the sprints in the speed graph (blue line). In my tracking, taken with Endomondo in my HTC Titan, there is no way to see anything like that (speed is green line). It seems just noise.
This is strange also because the position tracking appears quite accurate, when checking the path on google maps. I know that computing the speed from GPS position data is tricky, but I think the graph I obtain is far too bad, and pretty much useless.
Thinking it might be due to Endomondo, I tried Runtastic Pro, with similar (bad) results. In the attached file, I am walking at pretty much constant speed, and again I have noise all over, with speed varying between 5 and 10.
Does anyone experience a similar problem? Neither Runtastic nor Endomondo apps comments seem to mention this problem, so can it be specific to Titan? Any solution?
Thank you,
maTTeo

Related

[Q] How can you use an external GPS receiver with the GS2?

I have a Holux GPSlim 236 bluetooth GPS receiver that I want to use with my GS2 when I go mountain biking instead of the internal GPS as that would drain the battery too quickly.
I've successfully paired the receiver with the GS2 but none of the apps (Tracker, GPS Test, Maps, etc) actually "see" the external gps receiver and just display no lock and don't show any satellites. Switching on the internal gps receiver makes everything work as expected.
Is there anything special I need to do with the external receiver and pairing it to the GS2? Is there a setting buried in Android somewhere that directs all GPS apps to use an external receiver? On the old WM6 platform you could choose different com ports for the receiver but I see no options in android for that.
Never mind. It appears you need an app (yet again!) to do this. I installed blue4droid and it works now. Why isn't this functionality part of the core Android OS?
sunseaker said:
Never mind. It appears you need an app (yet again!) to do this. I installed blue4droid and it works now. Why isn't this functionality part of the core Android OS?
Click to expand...
Click to collapse
Very few people ask for this feature (first time I've seen a request). Your need is very specific, are you sure you will save much battery with a BT-link constantly running?
Older platforms like Symbian S60 and WMP6 supports this quite obviously since this was the only way to get GPS on many older smartphones, but on Android almost all phones have GPS from the beginning.
This seems like good example to me where a dedicated app is better than making the standard Android OS more complicated.
Please remember that more or less every app in the market fulfills purpose for a certain number of people, that doesn't mean that all these apps should be included in the OS...
I hear what you're saying but I'd be surprised if BT used as much battery as the GPS. I took the GS2 out for a test yesterday on a short 1.5 hour mountain bike ride with the internal GPS on and it drained 50% of my battery. A lot of my rides are usually a lot longer in the 4-5 hour range so the battery will never last.
I assume BT will use a lot less power but I have yet to test it which I'll be doing in the next few days.
As for it not being a common feature request, I guess that you are right when taking into account all the Android devices around but it's actually quite commonly asked for in the cycling and running world where you want to track your path and other parameters during your training. the phone batteries just cannot cope with powering the internal GPS for more than a few hours.
I don't mind using some apps to enhance the OS but I just feel with Android it seems expected that you need to bolt apps on to achieve what normally is basic functionality. Also a lot of the apps require permissions to parts of the phone that have nothing to do with the functions the app is providing. I'll concede that perhaps in this case an app would is suitable than having the functionality in the core OS.
sunseaker said:
I hear what you're saying but I'd be surprised if BT used as much battery as the GPS. I took the GS2 out for a test yesterday on a short 1.5 hour mountain bike ride with the internal GPS on and it drained 50% of my battery. A lot of my rides are usually a lot longer in the 4-5 hour range so the battery will never last.
Click to expand...
Click to collapse
50% in 1.5h sounds a lot.
I don't think this is because of the GPS, what app do you use to log the position? Does it keep the display on all the time?
I haven't checked battery when I've been logging that careful because it hasn't been a problem, but I can see that I have a 3.5 hours log in my track-list and I remember that I checked the map a lot as well during that hike. I'm pretty sure I wasn't close to draining the battery.
Modern GPS-chip doesn't use that much battery, people are overexaggerating the drain from GPS-chip, probaly because of problems with older chip designs. But a lot of software that uses GPS, e g car navigation system are often huge battery hogs though.
I've read that this is the chip inside SGS2:
http://www.csr.com/products/25/sirfstariv-gsd4t
It seems to use 8mW with 1hz update. So the battery in SGS2 can run only the GPS chip for (4V*1650mAh)/8 = 825hours...
So I believe the battery problem you have is caused by something else, so adding an external GPS might not solve anything at all.
Hmm, that throws a different light on it. I'm using Run.GPS for my tracks. I'll have to monitor this more closely and try a different app for comparison. What did you use for tracking your hike?
The app isn't keeping the screen on and I physically turn it off with the power button anyway. The app is also set not to illuminate the screen back light although I don't think it makes any difference with the AMOLED screen.
I'll try a comparison with the external GPS and see how much difference there is to try establish if the app is at fault. I expect tracking using the external GPS to use significantly less battery so if battery drain is still high then it points most likely to being the app at fault - we'll see.
Is there any app that can list the various apps / processes that are running and show how much cpu is being used? I want to see how much cpu power the tracking software is consuming.
sunseaker said:
Hmm, that throws a different light on it. I'm using Run.GPS for my tracks. I'll have to monitor this more closely and try a different app for comparison. What did you use for tracking your hike?
The app isn't keeping the screen on and I physically turn it off with the power button anyway. The app is also set not to illuminate the screen back light although I don't think it makes any difference with the AMOLED screen.
I'll try a comparison with the external GPS and see how much difference there is to try establish if the app is at fault. I expect tracking using the external GPS to use significantly less battery so if battery drain is still high then it points most likely to being the app at fault - we'll see.
Is there any app that can list the various apps / processes that are running and show how much cpu is being used? I want to see how much cpu power the tracking software is consuming.
Click to expand...
Click to collapse
I'm using my "tracks", it is an pretty good (but simple) app, but it does not do any GPS filtering, så especially data like max speed tend to be incorrect.
There are definately app's to check processes, but I don't know which is the best, I believe System Tuner Pro is good:
https://market.android.com/details?id=ccc71.pmw.pro&feature=search_result
I tried Tracker but preferred a more cycling specific app.
Thanks I'll look at that System Tuner app.

Amazfit for runners - Bad GPS Accuracy

HI all,
Got my English version of Amazfit last week.
I was really exited as I intended replacing my old garmin forerunner 405 with the new smartwatch.
On my first run yesterday I wore both watches and ran a usual 9km near my home.
At the end I got 9.03km on the garmin and 8.79km on the amazfit.
The difference is huge for such a distance.
Has anybody else experienced this? I guess this turns amazfit an unusable tool for Runners..!!
A.
you need to get a gps fix first, before starting the activity, have you done that?
when starting an activity, you need to wait for some 15~30 seconds, till you get a fix, and start running/biking/running around with a latex tale.
please try to re-test again, and also make sure that you have the latest version updated of the watch, 1.3.1m
Good luck!
vactirio said:
At the end I got 9.03km on the garmin and 8.79km on the amazfit.
The difference is huge for such a distance.
Click to expand...
Click to collapse
Are you sure the Amazfit is inaccurate and not the Garmin? If i compare Tracklogs from my Garmin Oregon 450 GPS with the ones from Amazfit they are both quite on the same level, the Amazfit does corners even a bit better. If the Amazfit drifts in position, the Garmin does, too.
And as already mentioned, the Amazfit starts a bit off. so if you want precision, wait for the GPS to be ready.
Beleriand said:
Are you sure the Amazfit is inaccurate and not the Garmin? If i compare Tracklogs from my Garmin Oregon 450 GPS with the ones from Amazfit they are both quite on the same level, the Amazfit does corners even a bit better. If the Amazfit drifts in position, the Garmin does, too.
And as already mentioned, the Amazfit starts a bit off. so if you want precision, wait for the GPS to be ready.
Click to expand...
Click to collapse
Hi 1immortal,
Yes I did wait a lot before starting.
In the fist 200m I had 40m of difference.
I thought thats ok - its the satellite fixing difference.
Then gradually this started getting bigger and bigger.
I run with friends who also have garmins and we mostly have a maximum of 50m difference in 10km which is acceptable.
found also this:
https://forum.xda-developers.com/smartwatch/other-smartwatches/amazfit-watch-impression-t3540770
vactirio said:
found also this:
https://forum.xda-developers.com/smartwatch/other-smartwatches/amazfit-watch-impression-t3540770
Click to expand...
Click to collapse
That issues were fixed. Both versions (US and CN) received updates for the GPS firmware. To make sure where the problem comes from you should take a closer look on the tracklogs in a suitable app on your computer. If you provide me GPX files from Garmin and Amazfit i will have a look on it. The shown distance on Amazfit has been quite accurate to the tracklog so far, while Garmin uses other methods to show the distance so i often had different distance on tracklog and on trip computer.
Another indicator is, that the tracklog for the Amazfit is the shortest. Bad GPS receivers usually measure greater distance as the coordinates are inconsistently jumping around and therefore create more meters.
Then you should always do multiple measurements. Sometimes the GPS just goes mad. Over the years i had different Garmin devices and now and then i was walking with a speed of 200km/h and was kilometers off...
Beleriand said:
That issues were fixed. Both versions (US and CN) received updates for the GPS firmware. To make sure where the problem comes from you should take a closer look on the tracklogs in a suitable app on your computer. If you provide me GPX files from Garmin and Amazfit i will have a look on it. The shown distance on Amazfit has been quite accurate to the tracklog so far, while Garmin uses other methods to show the distance so i often had different distance on tracklog and on trip computer.
Another indicator is, that the tracklog for the Amazfit is the shortest. Bad GPS receivers usually measure greater distance as the coordinates are inconsistently jumping around and therefore create more meters.
Then you should always do multiple measurements. Sometimes the GPS just goes mad. Over the years i had different Garmin devices and now and then i was walking with a speed of 200km/h and was kilometers off...
Click to expand...
Click to collapse
Hi Castra,
Thanks for the detailed answer.
I would be glad if you could examine GPX files.
Files attached.
Andreas
Okay, my name is not "Castra" btw.
Castra Regina is the ancient name of a roman fort that is called "Regensburg" nowadays. Thtat's where i come from.
I had a close look at your Tracklogs and did even look at the location in Google Street View. Really nice little town where you live. I think i will have to go to greece sometimes.
Mostly residential buildings so there is not too much influence on the signal. Anyway, the Amazfit does not perform as good as the Garmin and is drifting off in some locations. They are both not bad but the tracklog seems to be really a bit better on the Garmin.
Did you wear both watches on the same wrist or one left and one right? Was there probably someone running next to you that shielded or reflected the GPS signal? If not, the Garmin performs better here.
You did do the OTA Update to firmware 1.3.1m?
See Images, Blue is Amazfit, green is Garmin.
Beleriand said:
Okay, my name is not "Castra" btw.
Castra Regina is the ancient name of a roman fort that is called "Regensburg" nowadays. Thtat's where i come from.
I had a close look at your Tracklogs and did even look at the location in Google Street View. Really nice little town where you live. I think i will have to go to greece sometimes.
Mostly residential buildings so there is not too much influence on the signal. Anyway, the Amazfit does not perform as good as the Garmin and is drifting off in some locations. They are both not bad but the tracklog seems to be really a bit better on the Garmin.
Did you wear both watches on the same wrist or one left and one right? Was there probably someone running next to you that shielded or reflected the GPS signal? If not, the Garmin performs better here.
You did do the OTA Update to firmware 1.3.1m?
See Images, Blue is Amazfit, green is Garmin.
Click to expand...
Click to collapse
Hi,
Sorry about the name... and if you come to Athens I can give you a tour....
I wore Amazfit on the left and Garmin on the right. Amazfit was sometimes "blocked" by my running shirt which was not a thick one as the weather was good enough.
Its very usual that the 6 years old Garmin is blocked by the shirt (specially when its cold weather) but NEVER had a problem with that.
There was a friend running next to me but not blocking me.
So my fear that amazfit is inaccurate is probably true.
Thanks for the time spent. I think this is something runner should know before buying this watch as it turns it to be unusable.....
Latest firmware is installed.
Andreas
vactirio said:
I wore Amazfit on the left and Garmin on the right. Amazfit was sometimes "blocked" by my running shirt which was not a thick one as the weather was good enough.
Its very usual that the 6 years old Garmin is blocked by the shirt (specially when its cold weather) but NEVER had a problem with that.
There was a friend running next to me but not blocking me.
Click to expand...
Click to collapse
Well as the Amazfit is quite good when you are running in one direction and then drifts away in the other it might be that it just lost direct view to some satellites and then used reflected signals which make accuracy notable worse. A person just running by your side or your own body could cause that, while a shirt should not have any influence. So if the person was running to your left it might have had a big influence on the result.
A bit more scientific approach would be to wear both watches on the same wrist and do more runs for comparison before posting that the Amazfit is unusable.
I have been using the watch for two months now and did not experience such huge differences from my other GPS devices. And i really have a close look on many tracklogs as i use it to map new paths in Open Street Maps. I always have the watch and a Garmin Outdoor-GPS with me and use both tracks.
Beleriand said:
I have been using the watch for two months now and did not experience such huge differences from my other GPS devices. And i really have a close look on many tracklogs as i use it to map new paths in Open Street Maps. I always have the watch and a Garmin Outdoor-GPS with me and use both tracks.
Click to expand...
Click to collapse
I don't really agree with you
I run with Garmin for approx 5 years and I rarely got big deviations and it was always +/- 30m.
When you wear a watch you need to know that it works well in order to evaluate your pace.
As you saw in the maps Amazfit does not record well and this cannot / should not be explained by minor factors (left right hand).
The only really acceptable factor could be big buildings and bad weather. This is not my case.
I also searched on the net and found that there are some references about bad GPS reception.
Just for the info, why do you run with 2 GPS devices?
Andreas
vactirio said:
Just for the info, why do you run with 2 GPS devices?
Click to expand...
Click to collapse
I do not run with two devices but when i explore new areas or when i am Geocaching i use the additional Garmin GPS to get a second tracklog and to store Points of interest as new waypoints.
That is helpful sometimes when editing in OSM.
If Garmin works better for you, stay with it.
Their devices are quite good but a bit expensive. I had a few over the last 17 years.
Another test today in steep terrain. Today i had some minor drifts from the Amazfit compared to Garmin, previous tracklogs and OSM data, see attached image.
(Garmin magenta, Amazfit cyan)
The Amazfit really should get another update but as the sensor is quite new, chahces are good to get one.
Weirdest thing is that my Garmin created 725 trackpoints while the Amazfit created 14690. Distance 6,5 km....
They should probably reduce the amount a "bit" which could also save some energy.
I've received my Amazfit Pace version few days ago, updated to last US version. I noticed than GPS accuracy inside the building is terrible. I start Run workout in the office walking around 200-300 meters inside the room. After 6 hours Amazfit counted 30 !!! km of distance. I was shocked so much. Initially I was planning to use Amazfit for itinerary tracking or geotagging tracking during holiday trip. But with such accuracy it's not possible. Anyone has the same problem?
Noramas said:
I've received my Amazfit Pace version few days ago, updated to last US version. I noticed than GPS accuracy inside the building is terrible. I start Run workout in the office walking around 200-300 meters inside the room. After 6 hours Amazfit counted 30 !!! km of distance. I was shocked so much. Initially I was planning to use Amazfit for itinerary tracking or geotagging tracking during holiday trip. But with such accuracy it's not possible. Anyone has the same problem?
Click to expand...
Click to collapse
Are you serious? GPS inside buildings for sure isn't working!
alexinc said:
Are you serious? GPS inside buildings for sure isn't working!
Click to expand...
Click to collapse
Amazfit show me GPS as available inside the building because of large windows. BTW, if signal is low why Amazfit distance is jumped so much? I saw that distance on the screen was counted and increased almost every second without any watch movement.
I did the same test at home. If Amazfit is located near the window then distance is not counted and stuck on 0.00km. If I try to walk inside the room the the distance start to count and after few minutes show 300-400 meters. Strange.
Noramas said:
If I try to walk inside the room the the distance start to count and after few minutes show 300-400 meters. Strange.
Click to expand...
Click to collapse
It is not strange. GPS works by measuring the time signals from different satellites take to reach your device. Then your position is calculated by triangulation.
It is only accurate if you receive direct signals from satellites all over the sky. Inside a building you have no sky view so all the signals you get are reflected by objects like buildings, mountains. If they are reflected they travel a longer distance and so the calculation loses precision. That causes jumping positions and therefore creates some mileage.
Older, less sensitive GPS devices only used direct signals and were much more precise but they also completely lost position in dense forests and between high buildings.
All modern GPS consumer oriented modules on the market are optimised for a quick fix, even under worst condtitons, then comes power saving and price.
Precision is the least of the requirements as you can adjust your position to a map when using it for navigation. (Lock to road)
Good for all the smartphone manufacturers and Google Maps users but bad for all outdoor enthusiasts.
same issue
Hi!
I got the same issue. Amazfit CN version. Firmware Rel 9 (1.2.14) from XDA.
Running in forest, orienteering. Amazfit watch in Trail run mode always reports 400-500m less within 7-9km distance. Difference is confirmed by 5-6 runs.
For example today Amazfit watch: 7.97km, Endomondo (Samsung S7): 8.42km.
I see also issues with max speed, its unreal on Amazfir watch (crap should be filtered out).
I plan to do test using Amazfit and my old Garmin Forerunner 300 in next weeks to prove test results.
Kind regards,
J.
js_online said:
Hi!
I got the same issue. Amazfit CN version. Firmware Rel 9 (1.2.14) from XDA.
Running in forest, orienteering. Amazfit watch in Trail run mode always reports 400-500m less within 7-9km distance. Difference is confirmed by 5-6 runs.
For example today Amazfit watch: 7.97km, Endomondo (Samsung S7): 8.42km.
I see also issues with max speed, its unreal on Amazfir watch (crap should be filtered out).
I plan to do test using Amazfit and my old Garmin Forerunner 300 in next weeks to prove test results.
Kind regards,
J.
Click to expand...
Click to collapse
Hi J.
After opening this thread I did get in contact with Huami.
I informed them about the GPS accuracy problem and they were kind enough to send me a new watch.
Unfortunately this did not help. The new watch had exactly the same bad behavior.
So I stopped using the amazfit. I found also to have more than 200-300m less at a 9Km run.
As you probably know that's too much for such a distance.
Below is the mail I did send to Huami.
I did not get yet an answer to that and I think I will not get one
---------------------------------------------------------------------------------------------------------------------------------------------------
Got yesterday the new Pace. Pretty exciting I must admit.
I did a 9,5km run on purpose last night in order to test it.
On my left hand both Amazifit Pace and Garmin 405.
Unfortunately the results were not better and much disappointing
So to start I should say that I run in rural areas but in open space.
I attached to this email two GPX files in order to get examined by your team.
One from my old Garmin and One from Amazfit.
On the 9,5km run I got a liithe more than 200m of difference.
This difference is translated in 6 seconds of pace difference which is vary big for a runner.
Pace difference is shown bellow:
(strava is from amazfit and runkeeper is for garmin)
So I uploaded both GPX files on http://www.mygpsfiles.com/app/ in order to visualize them and the findings were interesting.
It seems that though Amazfit gets much more points than my old Garmin, those points are often very inaccurate.
Please find bellow some examples.
Orange trace is Garmin.
Blue trace is Amazfit Pace.
Amazfit (in blue) seems really off road.
Here it seems to loose distance. I did run as Garmin says to the roundabout
I must emphasize that its really an open space run with a very good GPS signal reception.
So it seems that its something going wrong with the GPS of the Amazfit.
I am wondering if there is a calibration problem with Europe/Greece.
vactirio said:
Hi J.
So I stopped using the amazfit. I found also to have more than 200-300m less at a 9Km run.
I am wondering if there is a calibration problem with Europe/Greece.
Click to expand...
Click to collapse
Thanks for explanation and visualization. Unfortunately I can't link my workouts with street as there are no streets in forest
I am little bit surprised about this: Endomondo makes less measurements and counts more, Amazfit makes times more measurements and counts less.
I was searching answers and found this article online (type: www dot fellrnr dot com/wiki/GPS_Accuracy), must read... Explains many issues from technical perspective.
I believe and hope that issues are related to software (firmware) of GPS chip and post processing and will be solved in the next firmwares.
Please also note: "AMAZFIT includes the world's first 28 nm Sony GPS sensor". As you know first is always first and requires debugging
"Sony – GPS (with 1/10th the power!) now sampling.
You know how using mapping apps on your smartphone kills your battery? Well now there’s hope. Sony’s getting some super impressive results with their new GPS using 28nm FD-SOI technology. These GPS are operated at 0.6V, and cut power to 10x (!) less than what it was in the previous generation (which was already boasting the industry’s lowest power consumption when it was announced back in 2013)."
You can find more info online.
I completely agree that for running numbers are important. Especially for high pace 4.30 and below, because each seconds counts. I will take Amazfit to my next street workouts for marathon training to do the same gps data analysis as you did above.
My strategy is to wait for firmware updates and hope issues will be resolved.
Thanks.

Amazfit Bip poor GPS accuracy, help

I just got an Amazfit Bip and took it out on hikes this weekend. The GPS distance seems to read high by as much as 30% when compared to a Garmin and a TomTom that we had on the same hike. When looking at the GPS tracks, it seems the Bip is erratic, the track zigzags a lot, which could explain the huge distance difference. Because of this erratic nature and that the Garmin and TomTom read almost the same, it points to the Bip GPS distance being quite inaccurate. For reference, compare these two tracks.
I am running firmware v1.1.1.00 on the watch. I can't tell what GPS firmware it has (how do I tell that?). Can the GPS be more accurate on the Bip or not? With GPS+GLONASS I expected much better. This post says they should be the same, but I am seeing huge differences. As a matter of fact, when sitting still I see a gain of 0.01mi every couple seconds!
Anyone have any advice? Thank you for any help you can offer!
Here is another example from a hike yesterday. The Bip is saying 25% too much distance. The Bip said I went 2 miles further, that is way too far off. If you look at the tracks closely you see that the Bip is very erratic. Closely looking at them, the TomTom seems to be following the best, it and the Garmin differ by less than 4%.
roombarobot said:
I just got an Amazfit Bip and took it out on hikes this weekend. The GPS distance seems to read high by as much as 30% when compared to a Garmin and a TomTom that we had on the same hike. When looking at the GPS tracks, it seems the Bip is erratic, the track zigzags a lot, which could explain the huge distance difference. Because of this erratic nature and that the Garmin and TomTom read almost the same, it points to the Bip GPS distance being quite inaccurate. For reference, compare these two tracks.
I am running firmware v1.1.1.00 on the watch. I can't tell what GPS firmware it has (how do I tell that?). Can the GPS be more accurate on the Bip or not? With GPS+GLONASS I expected much better. This post says they should be the same, but I am seeing huge differences. As a matter of fact, when sitting still I see a gain of 0.01mi every couple seconds!
Anyone have any advice? Thank you for any help you can offer!
Click to expand...
Click to collapse
Possibly A-gps update missing, poor receiving of gps signals (eg shielded/ under sleeve), interference from surroundings...
I found the AmazFit BIP as accurate as iPhone ... when it has a proper fix on the satellites.
I'm not sure on the 'other' sport settings, but in 'outside running' mode it takes a sample around every 1 second, and that sample frequency will affect the amount of zig-zag also.
The 'while sitting' or stationary setting, may still get a variation of 50m or even more depending on the momentary interference. (For 'GeoCaching' you'd have to be in 1 spot for 10 minutes to enable calculation of a more exact -around 1m accuracy- location. An averaging algorithm is included in some GeoCaching software...... but inside the BIP there is no offering for such software ).
I have the same issue, but more severe. The watch indicates the GPS signal is found and after awhile of running I check the watch and the distance has jumped 2-3 miles ahead of what it should be! The distance drawn is always all over the map for most of the run and only seldom does it actually show the route I used. It's really annoying as this happens every other time and messes up the whole exercise for me. Once I check the watch after the run it does indicate correct amount of steps and distance, but the Mi Fit app is forever stuck with the wrong data and no way to correct it. The watch was only partly visible from under the sleeve, but even this doesn't explain the problem as I used to run the whole winter with gloves and a much thicker coat completely covering the watch and didn't have these problems. Also the watch doesn't give those two quick vibrations after finding the GPS signal as it used to, which is also weird.
I saw this comparison the other day between Mi Band 2 on the silicone strap and on the metal bracelet. When on bracelet, the values were not accurate, they didn't correspond with the data on the phone, and on the silicone strap gave the correct values.

Amazfit GTS bad GPS

Honestly, the GPS is a ****. One week ago I did a small running. The GPS showed me about 5% less then the reality. For such a price of the watch it is OK. But yesterday I did the same trail, same weather conditions, but the watch showed me by 28% more! That's not acceptable even for the price of GTS...
Honestly, even the pedometer shows better results...
It's not about weather conditions. It's about currently available GNSS satellites over your head. GNSS is not static.
No, GTR and GTS have a badly designed antenna that results in a very weak signal. They found a workaround that helps if you keep A-GPS up-to-date and use Amazfit app and you walk/run close to roads (it smooths the path just like car navigation systems).
I read that calibration of compass helps GTS with GPS, but I do not know how to do that...
Ok, I found how to calibrate the compass, will see at weekend if it helps...
OK, so after the compass calibration the GPS is pretty OK, the difference is around 5%, it counts down the turnings so shows a little bit less. I compared it with Huawei Pro 3 and the result is the same.
I have tested the GPS of the GTS and I have to say that I'm impressed. I've read many bad comments but what I see is actually pretty accurate. I have compared the results with a Garmin Venu and the results (avg pace, distance) are practically de same (probably within error margins). I can definitely say that the GPS accuracy is on par with the Garmin. The only difference worth noting is the instantaneous pace, in the garmin it's more stable but the avg pace are almost the same. I only wished to be able to customize the metrics during a workout, meaning to be able to move the avg pace on the first screen.
PhilippeMulot said:
I have tested the GPS of the GTS and I have to say that I'm impressed. I've read many bad comments but what I see is actually pretty accurate. I have compared the results with a Garmin Venu and the results (avg pace, distance) are practically de same (probably within error margins). I can definitely say that the GPS accuracy is on par with the Garmin. The only difference worth noting is the instantaneous pace, in the garmin it's more stable but the avg pace are almost the same. I only wished to be able to customize the metrics during a workout, meaning to be able to move the avg pace on the first screen.
Click to expand...
Click to collapse
I agree, with latest update and a-gps update, we went skiing and I had no problem GTS tracked my speed, skiing paths and everything very nicely without problems. GPS lock on the beginning needed about 5-max10 seconds to lock.
I'm very satisfied with it

GPS quality bad? Have spikes when tracking ...

Hello alltogether,
for the last 5 years I've used a LG G4 a lot for gps-tracking when hiking. Rather seldomly I had spikes in elevation and distance measurement, even in situations with bad signal quality (e.g. in canyons) or no signal at all.
Now with Moto G8 Power GPS-quality is really bad - there are often spikes in elevation and distance when tracking the hike (navigation itself works good - it's only in the recorded track).
I've tried disabling akku optimization for my navigation app, used a cover without a magnetic clip, have exactly the same tracking settings with the same application (Osmand) - no effect. The gpx recording stays bad.
Does anybody know whether there is a possibility to "tune" the G8 Power, or is it simply the bad gps of a relatively cheap device?
Greets and thx in advance!
For accurate gpx files, I use the Qstars BT-Q818XT over bluetooth. It updates 5 or 10 times a second (latter is good for driving) and it is far more accurate than a phone for elevation. It is accurate w/in a few feet where any phone I've had was inconsistent. As a bonus for hiking, it uses a its own battery. I connect it via an app that wires it up over bluetooth using the developer mode and the mock location option. It is something to consider if you want accuracy.

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