http://jimhaynesebooks.com/archives/2008/03/17/types-of-gps-radio-signals-and-gps-receivers/ Publishing eBooks for profit, selling them through "swpstore" on eBay, writing articles for the fun of it and hopefully sharing ideas with the world. Wed, 19 Nov 2008 03:57:30 +0000 http://wordpress.org/?v=2.6