[android-developers] Re: Improving Local GPS Accuracy

2011-09-29 Thread hoyski
I worked on a civilian GPS system back in the days when Selective Availability was still enabled. (http://en.wikipedia.org/wiki/ Error_analysis_for_the_Global_Positioning_System#Selective_availability) In order to determine the well-known point from which to broadcast DGPS corrections, a receiver w

[android-developers] Re: Improving Local GPS Accuracy

2011-09-29 Thread lbendlin
Fair enough. But in order to use the DGPS approach you first need to use something (much) more precise than your Android GPS receiver to measure the DGPS base station location. A bit of a catch-22. -- You received this message because you are subscribed to the Google Groups "Android Developers

[android-developers] Re: Improving Local GPS Accuracy

2011-09-29 Thread Thomas
It appeared to work that way on the simple field test I conducted. I'll think up a more rigorous field test and report back one way or the other. I believe the WAAS (Wide Area Augmentation Systems) works in a similar manner. It measures the deviation from a know position and broadcasts the correc

[android-developers] Re: Improving Local GPS Accuracy

2011-09-29 Thread lbendlin
if you own the atmosphere and the random, indeterminate, probabilistic timing delays in there then yes. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe

Re: [android-developers] Re: Improving Local GPS Accuracy

2011-09-29 Thread Mark Murphy
On Wed, Sep 28, 2011 at 10:59 PM, Thomas wrote: > I thought it was more like owning the casino and dealing from your own > card deck. I suspect that what lbendlin is trying to say is that you are making an assumption: that the error introduced in one GPS coordinate has a relationship to the error

[android-developers] Re: Improving Local GPS Accuracy

2011-09-28 Thread Thomas
I thought it was more like owning the casino and dealing from your own card deck. On Sep 28, 2:00 pm, lbendlin wrote: > It's always fun watching people try to game probabilities.   -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post