Connected GPS feature SF3/Galileo supported smartphones

Dimitrios Kanellopoulos

This is the elevation profile comparison

Dimitrios Kanellopoulos

Mygps files calculates its own way the ascent.

All day in comparison look fine do not create a problem out of this.

Dimitrios Kanellopoulos

Watch looks better. At the moment Galileo from.my tests does not give more than 4% improvement. Tested on Android and the test gps apps that support Galileo.

Dimitrios Kanellopoulos

@jthomi said in Connected GPS feature SF3/Galileo supported smartphones:

Maybe the app was exactly 204 descent and ascent? The screenshot from the data in the app is also pretty close, only 0,40 meters off.

@slashas said in Connected GPS feature SF3/Galileo supported smartphones:

@luís-pinto but why one the right it is stuck on 204?

I would not bother with ascent at this time. All services do it their own way. Especially mygps files.

Dimitrios Kanellopoulos

Also the correct term is ascent. Elevation is altitude. You can say elevation gain for example or altitude gain or ascent.

Luís Pinto

@dimitrios-kanellopoulos In this case we cannot make that extrapolation, because Suunto app in smartphone will get information from 3 or 4 systems. We don’t know which satellites device use in certain activity. Unfortunately we cannot select on iOS or Android what system to be on/off.

jthomi

I also think watch looks better, you can see the track points, App has 2317 points and the watch 11684, guess that why its more accurate.

And I guess nobody here would make a problem out of it. I think even if watch looks better, they seem pretty similar, don’t they…

@dimitrios-kanellopoulos said in Connected GPS feature SF3/Galileo supported smartphones:

Watch looks better. At the moment Galileo from.my tests does not give more than 4% improvement. Tested on Android and the test gps apps that support Galileo.

Dimitrios Kanellopoulos

@luís-pinto said in Connected GPS feature SF3/Galileo supported smartphones:

@dimitrios-kanellopoulos In this case we cannot make that extrapolation, because Suunto app in smartphone will get information from 3 or 4 systems. We don’t know which satellites device use in certain activity. Unfortunately we cannot select on iOS or Android what system to be on/off.

Afaik they use the system service. I can ask for you.

Luís Pinto

@dimitrios-kanellopoulos If we can have access to information of native file maybe is possible to get that information (each satellite have one id). But in smartphones i really don’t know.

jthomi

@luís-pinto We should need the raw data then?

Luís Pinto

@jthomi i’m affraid yes.

jthomi

I think the target market for the SF3 will be fine with the accuracy of the tracking. If you look really closely to the two tracks, sometimes watch is better, and sometimes the app. And some parts of the route both are way off, guess the way the data is displayed on the maps is a source of error itself.

Dimitrios Kanellopoulos

@luís-pinto said in Connected GPS feature SF3/Galileo supported smartphones:

@dimitrios-kanellopoulos If we can have access to information of native file maybe is possible to get that information (each satellite have one id). But in smartphones i really don’t know.

I can do that for you.

jthomi

So, shall I give it another try tomorrow?

Luís Pinto

@jthomi And one important fact. All smartphones will have same performance? And OS can role a variable for results? What about antenna design in each phone? At this time i have many questions. We need several tests, several brand phones, different ambients. One variable we can’t domain. The choose of a GNSS system in phone. It’s not possible. In iOS i’m sure there isn’t.

Luís Pinto

There are no doubts. Suunto app will get the management that the operating system allows. I don’t think developers can improve that. Is suppose that we will have very variable results depending to the phone. For occasional registrations with SF3 the quality will be reasonable for most of users.

Luís Pinto

@dimitrios-kanellopoulos That would be very valuable!

NicolasP

@luís-pinto don’t forget that phones can use not only satellites but as well the mobile network for better accuracy. So it’s even more difficult to know what has been really used to record the track. Maybe a combination?

Luís Pinto

@nicolasp Well mentioned! I had forgotten that reality.

Luís Pinto

@nicolasp By the way i found this in one app for iPhone (iSmoothRun):

“GPS Quality
A few words on GPS signal quality and accuracy. GPS accuracy is not controlled by the app (or any app) but by the device. Apps only define what are the accuracy requirements for the specific use. We run the iPhone GPS unit always on maximum accuracy mode (it doesn’t have much impact on the battery). Any app would give exactly the same results (you can run two apps in parallel to check). We usually give better results than other apps, when there is no GPS signal and other apps give positions from WiFi spots or cell towers, while we switch to pedometer till we get a satellite fix again.”