This software consists of two programs:
First is designed to use on PocketPC device, connected via IrDA with Siemens x45 with Developer Menu enabled.
Second is designed to use on Windows PC.
Author: Dee, [HtR]team
Contact: decode [at] ukr.net

PocketPC's Graph GSM each second retrieves current GSM signal strength (for 900/1800) and plots it into a signal graph. It plots C1 criteria with a blue color, and C2 criteria with a green color, also detecting handover, it prints Cell IDs of serving cells, so U can track the signal strength with CID associated. Also it can save the log file for further use on a PC.
PC's Graph GSM takes one or more log files and plots them into graph(s) for all the time of your trace. Using several log files on the same track U can compare coverage of two(and more) operators, or signal changes after equipment change.

Here are some screenshots: