The format and unit type used for various columns within the CSV file for a Track Log recording are as follows:
|Format or Unit Type
Epoch time (see What is the time format used in an exported .CSV Track Log file?)
|Latitude and Longitude
GPS altitude (based upon WGS84) as provided by the iOS or a third-party device (usually feet).
|Pitch and Bank
|GPS Accuracy Errors
|Percent in decimal format.
This corresponds to an iOS-provided value ranging from 0 to 3: