Hi Dji

I have been looking at a long term problem with my spark concerning false altitude computations.
I have been looking at the data of various flights using DAT files loaded into csvview.

There are many data parameters under various sub headings and I would really like to find a more informed description of what and how some of these parameters are computed.

In particular can anyone enlighten me on the difference in the following IMU and OSD altitude parameters

OSD data.....VPS height, relative height
IMU_ATT(0) data......press: D, ALT: D, relative Height:C
IMUCalcs(0) data......height:C

I am not sure what the acronym OSD stands for, is it On Screen Display??

Is there any where a table that lists a full description of the parameters contained in the DAT files?

Thanks

Not entirely up to date or complete but take a look at
http://datfile.net/DatCon/fieldsV3.html
and also

http://datfile.net/Doc/IMUCalcs.pdf