I am using MyTracks GPS app (available on Google play store) installed on my smart-phone to track my movement. The record contains time order spatio-temporal points in the format of (X,Y,T) where X= longitude, Y= latitude and T= timestamp.
I set the accuracy level to be 10 m. But after tracking my travel I can see there are lots of GPS points which are unreasonable and may be due to multipath or some other issues.
Can anybody advise me how can i get rid of these errors?
Please note- I don't have any known coordinate in the entire record so there is no question of assessing of error estiamtion and error propagation. I have decided to use a Gaussian filter for this. But when I started developing the kernel I got stuck as I am dealing with two variables X,Y.
My question is, how can I address this issue? Do I need a bivariate gaussian kernel?
If yes, then whether lat and long are correlated to each other?
The last question (whether lat , long are correlated to each other) is really intriguing and I searched a lot but could not find the proper answer. Pls advise.