Is there any way to differentially correct a GPX file using free or open-source tools? Does a GPX file contain the necessary information for differential correction (I can put the timestamp in it accurate to 1s)?

As an aside, do I need to disable WAAS on my receiver for this to work?


Typically you need raw pseudorange and carrier cycle data to perform post processing, which is not usually contained in GPX.

  • Good point, I was thinking time was the only think I needed. Thanks!
    – mattwigway
    Feb 10 '12 at 17:02

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