GPS ru

Описание

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С помощью GPS-приемника (например, GY-NEO6MV2, ublox 6m), долгосрочные позиции могут быть рассчитаны. Таким образом, значения позиции GPS будет в среднем. В настоящее время GPS используется чтобы получить текущую дату и время.

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 indication (the more satellites are from different directions, the lower the error)
sat     number of satellites in view
spd     ground speed m/s
course  ground course degree
alt     altitude meter
lat     latitude
lon     longitude

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  GPS plot

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  GPS plot (heading/speed via doppler effect)

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  GPS 2d map (tracked perimeter)

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.