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GPS
HOW GPS WORKS
Currently, the GPS constellation consists of 26 orbiting satellites (including 3 spares), but this nu
mber will increase in the future.
The GPS receiver computes an accurate position by calculating the distance to the GPS satellit
es that orbit the earth. Signals are required from 3 satellites for two dimensional (2D) position
calculation whilst 4 satellites are required for three dimensional (3D) position calculation.
As mentioned earlier, GPS satellites are not geostationary, but they are orbiting the earth as illu
strated on the following figure:
[The GPS constellation]
Note that position is repeatedly fixed through the following three steps while any 3 satellites are
in line of sight.
Содержание Smart7 Series
Страница 8: ... 8 ...
Страница 13: ... 13 Smart7 Series System Metal Front Rear Main Screen Keypad Knob Mounting Bracket Connector ...
Страница 14: ... 14 Smart7 Series System Plastic Front Rear Main Screen Keypad Knob Mounting Bracket Connector ...
Страница 15: ... 15 Smart7 Series System SPEC of the connectors Metal SPEC of the connectors Plastic ...
Страница 21: ... 21 Display Chartplotter Data bar Scale Vessel icon AIS target ...
Страница 24: ... 24 Display Steering Destination waypoint name Destination waypoint NAV Information Direction of XTE ...
Страница 25: ... 25 Display GPS Information Satellite List Gain of Satellite Receiver status ...
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