[Galaxy Note II Android Development] dr.ketan:
GPS Fixer - GPS + Glonass

First of all i never found issue in GPS fixing, but y'day was just free and surfing XDA for some good stuff. I have seen many threads regarding GPS fix on various device. so I have downloaded them and checked for curiosity. Also I have plenty of ROMS there on my PC so I have explored SGS1/SGS2 (Non Glonass) device and look for GPS config. Surprisingly all I have found in flashable zip OR aroma installer was all having old configuration which was used in Non Glonass device.

Samsung using only one conf that is for north america.(this what i have seen on many ROMs I have explored). But still samsung stock conf are different on glonass devie and are better.

Who are not knowing about Glonass, just to add in note series we have GPS + Glonass system for better and speedy position tracking. Glonass (Global navigation satellite system) is differenet from GPS )Global positioning system) and launched by Russia. So if you use older configuration there won't have benefit of glonass on your device.

So really I do need to use GPS fix?

No, Really I never have any issue with stock settings. But if you have any issue with fixing you can try this. Also if you have fixed with other tool that may have old configuration then you can try this.

What is difference from other GPS fix

As earlier I have said many i have downloaded from different forum on XDA have old non glonass config. Which really won't get any benefit but worsen fixing time. Also someone have asked me about known tool on market Faster Fix, So I have downloaded and tried that but surprisingly that also having non glonass settings. I have took some screenshot and will post here at end of post.

How I can know My setting using Glonass setting

Just install GPS test from market and check satellite number you are getting (I will add image at end of post). If you are not getting/rarely getting view of satellite number >65 then your setting are using non glonass conf.. Also when you select satellite position view in GPS Test app, Glonass satellite you can see in symbol of Triangle while GPS are round.

How do I test new Settings

-If you applying new setting with other tool/Application then you should clean data of GPS (data/gps - remove all files from here), bcoz your old data may help new setting to fix bit faster depending on location history but it won't catch new when you move to different place and give you false result. first apply new settings then clear data from data/GPS and reboot device. After Rebooting open GPS test application and look for time taken to fix (satellite postion view will show you time)/Number and type of satellite as well accuracy.

So best way to test

-In case you want to test this tool, simply flash it with aroma, this tool auto erase old data. After rebooting check with GPS test as said above.

Some results

Ok so here screenshots with Non Glonass configuration 1.With Non glonass continental setting 2. Non Glonass country setting

So what we can interpret here is with this setting none of glonass satellite used to FIX GPS. First image showing satellite number is between 02-25 and second image between 03 -32 but none of it having number more than 65 which indicates Glonass. Also you can see accuracy is also not good. select country setting it was bit approved but time was same on both.

Using This tool with 1.Continental setting 2.Country settings3.stellite position view

You can see here in first image there are 5 glnass satellite there (representing between 65-87) while second image have 3 glonass satellite (72-86)

Also you can see accuracy are much better than non glonass setting. third image is satellite position view with continental setting, you can see there are many triangle symbols which represents Glonass satellite. Also note time took to fix was just 8sec. Again to remind you i was in side Room not under sky directly throughout all tests.

Faster Fix result

Here satellite position view with using faster fix with country settings

Here you can see there is no glonass satellite used to fix position and time took to fix also longer.

Conclusion :

- If you don't have any issue on stock default setting then no need to do anything.

- If you are using custom setting, then clean data from data/GPS folder (remove all files under it) reboot device and carry out test. If it doesn't use glonass satellite to fix, you should update your settings with attached tool.

- I don't find much improvement in continental and country setting, Best result I got is with my continent. so no meaning to make different settings for every country, remember samsung using only one continental setting for all (north-america). But if you are not happy with your continent settings you can try others, it may depends on pool server.

Hope this may help to understand GPS fixing better way !

No need to post lots of screenshot unless you unable to interpret it bcoz I don't wish this thread to be screenshot repository like on battery/score statistic. I have attached here for just better undertandings. Though your result sharing will be highly appreciated and will help to others.

PS : Not disrespect for tools i have tested but I like to credit them for their great work, just issue is database used was old and for non glonass device and samsung also no more using it on glonass device.

Download

DrKetan_GPSFix_Aroma

Mirror http://d-h.st/5gG