The book Numerical Recipies in C has code that can be converted to BASIC. You can find the whole book at a number of places on-line. Just do a search in google.
Hope this helps.
We use a similar material for calibration of ct scanners. The material is called "solid water" and you can buy it in most dimensions from a company called Gammex in Middleton, WI. Do a search on the internet for them and you will find their website.
Hope this helps.
Here is a page out of MSDN on conversion routines. Hope this help!
********************************************************
Data Conversion
These routines convert data from one form to another. Generally these routines execute faster than conversions you might write. Each routine that...
It is possible to get a series capacitance by running two microstrip lines close together, however the amount of capacitance attained is small. To increase this capacitance each side is of the microstrip line is "forked out" with the tongs of the fork interleaved. This method increases...