My Suunto Spartan Trainer seems to under calculate elevation gain when cycling. I have done a number of longish rides where the total elevation measured by both Garmin and Wahoo devices is significantly higher than that recorded by my watch. For example, on a 100 mile ride the other day my watch recorded just over 3000ft whereas other devices all recorded over 5000ft. Is there any explanation for this discrepancy?
SST doesn’t have barometer, therefore altitude is calculated solely by using GPS data. This means altitude data can be unreliable depending on conditions…
@jaimechapman This is not unusual without a barometer and can be corrected after the fact. I have seen similar discrepancies with the S9 that does not contain a barometer.
100 mile with 5000ft is basically a flat ride. The difference could be given by the known method of calculating the height difference.
The barometric watch calculates as difference in height 3m consecutive, the gps clock every 7m.
Thus, if on a substantially flat lap, there are ups and downs within the 6 consecutive meters, these are not considered.
On the contrary, in a continuous climb, we assume from 300m to 800m, the positive height difference shown by a gps watch and a barometric one should be the same.