black box in-flight data recorder

[E69_vencejo]

Finish the very first test.
All work, including the 3 test and excel file. THANKS!
Hud data:
Working all data default, with remarks:
TIME: Refresh every 0.9 seconds in my pc ( processor 2.66 mgh @ 3.6).
ROC: no work in bf´s (they dont have climb/descent rate gauge) and Tiger (it have it).
HEADING: work on all models.

Questions:
What is PEI?
What is the difference between "I_VelocityIAS" and "Z_VelocityIAS"?
What is the difference between "I_Altitude" and "Z_AltitudeAGL/Z_AltitudeMSL"? (i think agl=altitude from ground level and msl=from sea level)

Well, is too late for me now, so I leave the rest for tomorrow
Good night and thanks again.