Can Anyone Help On AT Commands

I am currently working on a school project which involves the use of GSM Modems, GPS,  and micro controllers to implement vehicle tracking telemetry.

There has not been any problem on getting the hardwares but I do not seem to get much resources on this topic as there are very little written materials on the subject available on the internet.
I got to understand recently that the software section of the project will require the knowledge of AT commands but I do not know anything about it.

I will therefore appreciate it if anyone out there will help me on AT commands. Not necessarily teaching me but referring to materials that will teach me AT commands.

Thank you.

Thanks.
Im waiting.

U can use the "AT+CMGR" command to retrieve the satellite coordinates but u need to filter the results and use for some input for the application.
I have a ready made application built to decode SMS messages sent from a GPS Car tracker to a modem.The application was designed to send to a LED Display the current location of the vehicle via a micro controller.U can call me on 08034209301 for it.