Columbus V - 990 Mark II, Руководство пользователя, Страница: 11 / 40

The Global Positioning System (GPS) is a satellite-based navigation system made up of a
network of 24 satellites placed into orbit by the U.S. Department of Defense. GPS was
originally intended for military applications, but in the 1980s, the government made the
system available for civilian use. GPS works in any weather conditions, anywhere in the world,
24 hours a day. There are no subscription fees or setup charges to use GPS.
The GPS is operated by the United States government, which is solely responsible for
accuracy and maintenance of the system. The accuracy of location data can be affected by
adjustments to GPS satellites made by the U.S. government and are subject to change with
civil GPS policy and the Federal Radio navigation Plan. Accuracy can also be affected by poor
satellite geometry.
Notes:
(1) The receiver is a positioning device that receives RF signal from GPS satellites, which are
20,000km above the earth. To receive the best signals, use the receiver in open space
wherever possible.
(2) The positions of GPS satellites are continuously changing. Depending on when and
where the device is used, it may take long to acquire the position, or positioning may be
temporarily unavailable.
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About GPS
(3) Although sometimes the device can also be fixed
indoor, can not guarantee the accuracy of positioning
within the enclosed space.
(4) The device may fail to position and track when you are
moving at a speed of more than 800km/h.