Can someone explain to me the e-offset in the aero lab Chung analysis program in Golden Cheetah? It sure makes a difference on the final CdA value depending on what the e offset value is. After the explanation, maybe tell me if it should indeed be left on auto, or what it should be slid to.
Can someone explain to me the e-offset in the aero lab Chung analysis program in Golden Cheetah? It sure makes a difference on the final CdA value depending on what the e offset value is. After the explanation, maybe tell me if it should indeed be left on auto, or what it should be slid to.
It’s elevation offset. Unless you suspect your Garmin has a faulty reading of the initial altitude, I’d leave it on auto.
Elevation offset is just there to line up the 2 curves. Auto just puts the start of the 2 curves together. If you’re riding loops back to a known position you can ignore the actual elevation line by checking the fixed elevation checkbox and then make sure the peaks and troughs line up with the flat line.
ETA. within the same ballpark elevation, it doesn’t matter at what height you start at if you climb 30m and then drop 55m. GPS and barometric altimetry is prone to error. Civilian GPS tends to focus on positional accuracy so the altitude suffers. Barometric altimeters can be noisy and drift over time with atmospheric changes. In the likes of Garmin head units, their resolution is limited too.