
Waas and EGNOS improve GPS positioning accuracy
This is also a very interesting question. When buying GPS devices, you know
that GPS has many characteristics. Waas and EGNOS can double the positioning
accuracy, but these two characteristics are not completely applicable for users
in China.
The full name of WAAS is the Wide Area Augmentation System, that is, the
wide area enhancement system, the purpose is to further provide the accuracy of
the GPS positioning, the region is limited to the United States; the full name
of the EGNOS is the EUROPEAN GEOSTATIONAVIGATION OVERLAY Service, which is
basically the overlap service of the European Star Navigation, which is
basically basically basically. Empathy is equivalent to WAAS, only serving in
Europe. Although your GPS has these characteristics, the upper use is limited to
specific areas.
China is also developing the corresponding system. In fact, the principle
of this enhancement system is very simple. On the existing GPS artificial
satellite system, add more than three or more static track satellites.
Similarly, it runs on the orbit of Earth's rotation speed to become a relatively
static state. The GPS receiver also receives the signals issued by these
satellites at the same time to modify the error caused by the original GPS
system due to the atmospheric conduction, which further improves the positioning
accuracy of about 5 meters, which looks very tempting.
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