readme

根据GPS官方网站提供的gps定位方法而编写的C语言gps定位代码

This directory contains the source for three applications which
process different types of GPS data in order to obtain successively
better position fixes.

These are:-

1. stdalone  - basic calculation using data from one GPS receiver

2. singdif   - basic differential calculation using data from two GPS receivers

3. sdsmooth  - differential calculation using data from two GPS receivers
               enhanced in accuracy by using carrier phase information

Sample input and output files are provided, so you can check out the correct
functioning of the code. I have tried as much as possible to make the code easily
re-usable for future applications.

The background to this 'C' code is given at:-

http://vase.essex.ac.uk/projects/gps/djjweb/

The original Pascal source, from which the code has been translated is fully
described at:-

http://callisto.worldonline.nl/~samsvl/software.htm

Any software improvements/fixes are welcome. If you find the code of use,
perhaps you might to drop a line!


	 				5th Oct 1998
	 				David John Johnston	( [e-mail] )