Hi! We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
But as we’re losing ad-revenue from this then why not make a donation towards website running costs?. Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
Posted: Fri Oct 18, 2013 5:17 am Post subject: calculation of speed in GPS
Hi,
In GPS module, i are getting information about
1. latitude and longitude
2. Time
3. Horizontal Estimated Positional Error
4. Heading
5. vertical speed
6. horizonatl speed
7. Altitude
8. Location uncertainty angle
9. Standard deviation of axis along
10. Standard deviation of axis perpendicular to
How can we calculate the velocity of GPS device based above information?
Can any one explain it? if possible with example.
Joined: Apr 04, 2006 Posts: 10118 Location: Bexhill, South Sussex, UK
Posted: Fri Oct 18, 2013 9:11 am Post subject:
The horizontal speed gives you the horizontal velocity probably in M/sec. If you are gaining or loosing height at the same time, you can use Pythagoras to calculate your velocity and angle to the horizontal/vertical and the heading reading gives your horizontal direction.
Bear in mind that the vertical accuracy of a GPS device is not as good as the horizontal.
It would have been good had you asked this question along with your others here
The use of the word 'heading', although in general use meaning direction of travel, it is not strictly true as that. The heading of an aeroplane (say) is the direction in which the pilot is pointing the aircraft. Its 'track' is the direction it is actually travelling in over the surface of the earth. The two may differ (considerably, in the case of a boat) due to cross winds or cross currents causing the aircraft/boat to drift off course and not track in the direction of their heading. You have to steer (head) into the wind/current enough to cancel the drift in order to maintain the wanted track.
1. You should choose the sampling rate, according to precision needed and calculate using latitude and longitude (this is fair enough) to calculate the path length.
2. In case you need to calculate distance from point A to point B - use lat/lon(A) and lat/lon(B) with the same calculation.
Posted: Today Post subject: Pocket GPS Advertising
We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
Have you considered making a donation towards website running costs?. Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
Hi! We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
But as we’re losing ad-revenue from this then why not make a donation towards website running costs?. Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!