In our opinion, that depends entirely on what you plan on using it for. All these things can have such a negative impact on the accuracy of your positioning and altitude that they can even result in deviations of up to 100 metres. Plus, the signal can also be reflected off walls. Even a dense forest can weaken the signal.
Clouds weaken the signal, while deep canyons can even isolate the receiver altogether. This is due to the fact that a GPS signal behaves physically similar to light. However, if your device only finds four satellites, it is possible that both your positional and altitudal information will strongly deviate from the reality of the situation. If there are several available satellites, the receiver will be able to pick and choose, giving you the best and strongest signals. The accuracy of this geodetic triangulation of your location also depends to a large extent on the quality of the signal. However, in order to receive information about your current altitude, the receiver requires a signal from at least 4 satellites. The exact position of the device is determined by means of signals from various satellites in earth’s orbit. The Garmin Montana 610 with a barometric altimeterĪs the name suggests, GPS devices use the American Global Positioning System (GPS).
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