5
About GPS
GPS (Global Positioning System) is a satellite navigation system developed by the U.S. Department of
Defense. GPS consists of 32 satellites orbiting around 11,000 miles above the surface of the Earth.
These satellites travel at speeds that allow them to orbit the planet twice a day and emit a low-powered
radio signal. These signals are received and recorded using five ground stations with extremely accurate
clocks. By using these extremely accurate clocks, the ground stations can determine with great precision
the position of every satellite in their orbit. Your GPS receiver is capable of "reading" the signals
transmitted by these satellites. By knowing the position and distance of al least 4 satellites, it's possible to
accurately calculate the receiver's current latitude, longitude and elevation.
WAAS enhances the accuracy of your GPS. WAAS stands for Wide Area Augmentation System and was
developed by the Federal Aviation Administration to augment the accuracy of GPS for aviation use. It
consists of additional ground stations that are placed at specific locations where the exact coordinates
are known. When used with a master station, the accuracy of satellite positioning signals can be
improved to almost three meters.
The
Back Track
must scan and detect signals from at least 3 such satellites in order to calculate your
current location and movement. The
Back Track
is designed for recreational use only. Please do not use
this product for industrial or professional surveying.
Summary of Contents for Back Track
Page 1: ...Back Track User Manual ...
Page 21: ...21 Back Track Bedienungsanleitung ...
Page 41: ...41 Manuel d Utilisation du Back Track ...
Page 61: ...61 Back Track Manual del Usuario ...
Page 81: ...81 Back Track Manuale utente ...
Page 101: ...101 Manual de Utilizador Back Track ...
Page 121: ...121 Back Track 使用手冊 ...
Page 128: ...128 1 3 更換電池 將電池蓋螺鎖旋開 打開電池蓋 如圖所示 將電池蓋螺鎖旋開 打開電池蓋 將 2 顆四號鹼性或鋰電池置入電池室內 ...
Page 137: ...137 2 6 其它功能 1 啟動背光 按下標定 背光鍵啟動背光 ...