GPS: Unterschied zwischen den Versionen
Aus www.wiki.ardumower.de
(→Visualization of GPS data) |
(→Visualization of GPS data) |
||
Zeile 19: | Zeile 19: | ||
= Visualization of GPS data = | = Visualization of GPS data = | ||
GPS data (course, speed, position etc.) can be plotted by pfodApp. One neat thing I discovered is that you can get precise heading and speed even when moving short distances (< 2m). This works because the GPS receiver is evaluating the signal phase due to the doppler effect. | GPS data (course, speed, position etc.) can be plotted by pfodApp. One neat thing I discovered is that you can get precise heading and speed even when moving short distances (< 2m). This works because the GPS receiver is evaluating the signal phase due to the doppler effect. | ||
+ | |||
+ | hdop measurement error (the more satellites are from different directions, the less the error) | ||
+ | sat number of satellites in view | ||
+ | spd ground speed | ||
+ | course ground course | ||
+ | alt altitude | ||
+ | lat latitude | ||
+ | lon longitude | ||
<gallery> | <gallery> |
Version vom 22. Mai 2015, 20:58 Uhr
Inhaltsverzeichnis
Abstract
With the help of a GPS receiver (e.g. GY-NEO6MV2, ublox 6m), the long-term position can be calculated. Therefore, the GPS position values will be averaged.
Currently, GPS is used
- to receive current date and time
Wiring:
GPS TX (3.3V compatible) -- Arduino RX GPS RX (3.3V compatible) -- Arduino TX GPS VCC -- Arduino VCC 5V GPS GND -- Arduino GND
Visualization of GPS data
GPS data (course, speed, position etc.) can be plotted by pfodApp. One neat thing I discovered is that you can get precise heading and speed even when moving short distances (< 2m). This works because the GPS receiver is evaluating the signal phase due to the doppler effect.
hdop measurement error (the more satellites are from different directions, the less the error) sat number of satellites in view spd ground speed course ground course alt altitude lat latitude lon longitude
GPS error
Typical GPS error is 2-5 meters (at a sample rate of 1 Hz). As this is not sufficient as a replacement for a perimeter wire, GPS can only be seen as an extension or for global navigation (navigation from one lawn to another lawn) or to improve the result of a sensor fusion.