Connected GPS feature SF3/Galileo supported smartphones

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.”

Dimitrios Kanellopoulos

I asked and the developers replied that the best mode for accuracy is asked and they do not ask for a specific location provider which means that it will use what the phone is capable of.

jthomi

Another test from today’s tour:

http://www.mygpsfiles.com/app/#Ai1QGGkJ

Again with iPhone7 SuuntoApp tracking in comparison to tracking with the Suunto Spartan Sport.

Luís Pinto

@jthomi Thank you again! What you done its appreciated. Same conclusion, line of watch seems more accurate. One thing that i didn’t understand, did you use in watch Navstar+Glonass ou just one?

There is a limitation on system for smartphones. We never can select in which system we want to make a registry. This is of course a real problem to compare. If we get satellites with types of different precision, how a OS make a read? From average?

Even by now it’s not possible in watches for example select Glonass alone.

Anyone with another smartphone brand?

jthomi

Honestly I totally forgot that I can switch on Glonass. Guess I have to make another round then…but not today…

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

@jthomi Thank you again! What you done its appreciated. Same conclusion, line of watch seems more accurate. One thing that i didn’t understand, did you use in watch Navstar+Glonass ou just one?

jthomi

@luís-pinto All those functions!! aarrrghhh

Dimitrios Kanellopoulos

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

@luís-pinto All those functions!! aarrrghhh

How can you select only one system in the iPhone?

NicolasP

My phone Samsung Galaxy S7 is not compatible Galileo but pretty sure the settings are the same for S8 & S9.
As you can see Samsung lets you choose the accuracy level you want.

Perhaps S8/S9 owners could confirm what they have in terms of location accuracy setting.

Dimitrios Kanellopoulos

Guys there is no setting to choose a satellite system from the phone!
Don’t worry about that.

Only devs can select that if they want.

jthomi

@dimitrios-kanellopoulos

Not on the phone yes, but on the watch I can switch Glonass on and off.