Comments on: Software GPS, Part 0 Introduction http://www.jera.com/jbrewer/2009/01/software-gps-part-0-introduction.html The Geeky Side Sat, 24 Sep 2011 08:25:58 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Kevin Holzer http://www.jera.com/jbrewer/2009/01/software-gps-part-0-introduction.html/comment-page-1#comment-92 Kevin Holzer Wed, 08 Dec 2010 00:03:22 +0000 http://www.jera.com/wordpress/?p=9#comment-92 Stumbled on your blog when I read a post from you on the WELL. I just implemented the gradient descent algorithm used to do most of the position estimating in the GPS receiver for a course I am taking (or at least a slightly simplified version of it; we are using synthetic data that simplifies the problem ever so slightly); I'll post the paper and the code on my website if you're interested. Most GPS receivers (probably even your bluetooth receiver, using serial over Bluetooth) output raw data in a standard format (NEMA); I'd imagine it would be pretty trivial to implement the position estimating algorithm with all of the tricks given a weekend and a lot of coffee. Stumbled on your blog when I read a post from you on the WELL.
I just implemented the gradient descent algorithm used to do most of the position estimating in the GPS receiver for a course I am taking (or at least a slightly simplified version of it; we are using synthetic data that simplifies the problem ever so slightly); I’ll post the paper and the code on my website if you’re interested.
Most GPS receivers (probably even your bluetooth receiver, using serial over Bluetooth) output raw data in a standard format (NEMA); I’d imagine it would be pretty trivial to implement the position estimating algorithm with all of the tricks given a weekend and a lot of coffee.

]]> By: Reid http://www.jera.com/jbrewer/2009/01/software-gps-part-0-introduction.html/comment-page-1#comment-4 Reid Tue, 03 Mar 2009 03:27:32 +0000 http://www.jera.com/wordpress/?p=9#comment-4 I was always curious why altitude readings always seem to lack the accuracy of the Lat/Lon readings. Perhaps it's hardware-related, or it's intentional, or it was just a fluke that it said my boat was 300 feet below sea level. I was always curious why altitude readings always seem to lack the accuracy of the Lat/Lon readings. Perhaps it’s hardware-related, or it’s intentional, or it was just a fluke that it said my boat was 300 feet below sea level.

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