# Understanding Mission Planner tlog in MATLAB

**URL:** <https://discuss.cubepilot.org/t/understanding-mission-planner-tlog-in-matlab/11827>\
**Category:** Mission Planner\
**Created:** [6 September 2023 22:47 UTC](https://discuss.cubepilot.org/t/understanding-mission-planner-tlog-in-matlab/11827 "2023-09-06T22:47:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Tomas\_Mendoza](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/tomas_mendoza/32/6977_2.png) [@Tomas\_Mendoza](https://discuss.cubepilot.org/u/Tomas_Mendoza)\
**Post date:** [6 September 2023 22:47 UTC](https://discuss.cubepilot.org/t/understanding-mission-planner-tlog-in-matlab/11827/1 "2023-09-06T22:47:13Z")

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![image](https://discuss.cubepilot.org/uploads/default/original/2X/c/c1386e1a6236ce73b215238e119713c72c73699f.png)  
So I have the roll\_mavlink\_attitude\_t matrix open in MATLAB. Is the left column the time and is the right column the actual roll angle? Also, if the left column is time, is it in seconds?

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**Author:** ![markskyways](https://discuss.cubepilot.org/letter_avatar_proxy/v4/letter/m/c67d28/32.png) [@markskyways](https://discuss.cubepilot.org/u/markskyways)\
**Post date:** [11 September 2023 13:57 UTC](https://discuss.cubepilot.org/t/understanding-mission-planner-tlog-in-matlab/11827/2 "2023-09-11T13:57:36Z")

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Since it has been 5 days I’ll take a stab at this; I am not sure though. I believe it is serial time ([https://github.com/ArduPilot/MissionPlanner/blob/fdb080ea838bb49dcbcdaef2032c3b9f4befdfbd/ExtLibs/Utilities/MatLab.cs#L394C1-L400C32](https://github.com/ArduPilot/MissionPlanner/blob/fdb080ea838bb49dcbcdaef2032c3b9f4befdfbd/ExtLibs/Utilities/MatLab.cs#L394C1-L400C32)).

You should be able to explore the code base in the same way to figure out what the roll message is.