Accuracy of 0-60 times with 1Hz GPS

All topics on using and maintaining this forum
Post Reply
User avatar
mecheng1
10 or more Posts ★
10 or more Posts ★
Posts: 10
Joined: Thu Nov 05, 2015 11:05 pm

Accuracy of 0-60 times with 1Hz GPS

Post by mecheng1 » Sun Jan 20, 2019 12:27 am

I was wondering how accurate the 0-60 mph or other acceleration times can be, if they are based on a 1Hz phone GPS signal. Must be +/- 1 second ?
User avatar
Harry
Site Admin
Site Admin
Posts: 9440
Joined: Sun Sep 12, 2010 10:32 am
Location: Siegum, Germany
Contact:

Re: Accuracy of 0-60 times with 1Hz GPS

Post by Harry » Sun Jan 20, 2019 8:38 am

Interpolation technics allow an accuracy of up to 0.05s for 1 Hz GPS. The results depend mostly on the GPS
accuracy achieved, not update rate. In case you are interested in the math, see the Train the Trainer document. It has a slide on interpolation included: http://www.gps-laptimer.com/TrainTheTrainer-Harrys.pdf

0.05s should be considered the best case, 0.1s is more realistic with the built in GPSes.

Harry
Image Image Image Image
User avatar
mecheng1
10 or more Posts ★
10 or more Posts ★
Posts: 10
Joined: Thu Nov 05, 2015 11:05 pm

Re: Accuracy of 0-60 times with 1Hz GPS

Post by mecheng1 » Wed Jan 23, 2019 2:07 am

Thanks so much Harry. So it's based on kinematic equations, assumption of constant acceleration, and interpolation between GPS fixes?

As long as it is accurate enough to demonstrate that my Jaguar F type V8S is faster than my brother's AMG C63s, I'm happy. :D :lol:
User avatar
Harry
Site Admin
Site Admin
Posts: 9440
Joined: Sun Sep 12, 2010 10:32 am
Location: Siegum, Germany
Contact:

Re: Accuracy of 0-60 times with 1Hz GPS

Post by Harry » Wed Jan 23, 2019 8:08 am

I keep my fingers cross :-)
Image Image Image Image
Post Reply