10-12-2022, 04:01 AM
[attachment=561]Just started using phyphox and I really like access to all the sensors and data. I do have a question, though.
In one experiment I've done, I use the Location (GPS) feature to record the velocity of my canoe as I paddle it up to a fixed speed then let it drift to a stop. (The rate of deceleration is a measurement of the drag.) The export of Speed every second looks credible and I'm inclined to believe it but in checking the reported speed against a manual speed calculation based on a) the change of recorded distance and b) the distance from change in latitude and longitude I get different results. The latter two agree except they appear to be offset by one interval. The travel is in a relatively straight line, so I don't think it's that.
I have version 1.1.11, build 10011, file format 1.15 on a iPhone 13.1, iOS 14.4.2
Original data file with my added calculations and graphs attached.
Any insight would be welcome. Thanks again.
In one experiment I've done, I use the Location (GPS) feature to record the velocity of my canoe as I paddle it up to a fixed speed then let it drift to a stop. (The rate of deceleration is a measurement of the drag.) The export of Speed every second looks credible and I'm inclined to believe it but in checking the reported speed against a manual speed calculation based on a) the change of recorded distance and b) the distance from change in latitude and longitude I get different results. The latter two agree except they appear to be offset by one interval. The travel is in a relatively straight line, so I don't think it's that.
I have version 1.1.11, build 10011, file format 1.15 on a iPhone 13.1, iOS 14.4.2
Original data file with my added calculations and graphs attached.
Any insight would be welcome. Thanks again.