70
Using the GPS Function
Method of Positioning by GPS
About Positioning by GPS
“Positioning” refers to calculation of your current position from the satellite orbit
information and radio propagation time. At least three satellites need to be acquired
for successful positioning. If positioning fails, move away from buildings as far as
possible and stand in an area with open sky.
About errors
A positioning error by several hundred meters can occur due to the environmental
conditions. Under favorable conditions, positioning can be performed successfully
using only three satellites. However, under the following poor conditions, the
positioning accuracy can decrease or positioning can fail.
- Between tall buildings
- Narrow paths between buildings
- Indoors or in close vicinity to large buildings
- Beneath bridges or high-voltage lines
- Between trees such as in forests or woods
- Inside tunnel or underground
- Usage behind heat reflective glass
- Areas with strong magnetic fields.
Searching for satellites when using the GPS function for the first time each
day
When you use the GPS function for the first time after purchase or the first time in the
day, a few minutes are required to search for satellites. Also, when using the GPS
function after turning off the transceiver for several hours, a few minutes may be
required to search for satellites.
FT1DR̲DE̲Eng.indb 70
FT1DR̲DE̲Eng.indb 70
13/06/28 15:16
13/06/28 15:16