APM log analysis

I personally prefer to use mavproxy and it's example utilities (such as mavgraph.py). It should be ported to windows by now. More info about mavproxy on diydrones.com.

Randy Mackay made some nice instructional videos on analyzing APM log files with Mission Planner and Microsoft Excel (basically any spreadsheet tool will do as long as it understands delimited text files).

First, the onboard logs are always available except if the APM is destroyed, for example, in a crash. This video shows how to analyse the onboard logs of an ArduPilot Mega board:


For those new to APM, Randy explains in more detail how to obtain the onboard logs of an APM 2.5. Make sure to connect your APM board via USB to the computer and you might use APM Mission planner to download the onboard logs:


Telemetry log files (*.tlog) provide much more information than onboard logs. The telemetry logs can be analysed in Mission Planner as well. Here a short overview on ho to work with tlogs in mission planner: