position. GPS signal only can be received out of the
room and face to sky.
5.1.2 Please check the offline area in order to judge if the network
problem of operators.
5.2 When GPS unfixed, please drive in the open sky and ensure
there is no metal thins on the device.
6.Appendix
（
Test Report
）
Device Position: Device placed under the front windshield
of the car with the antenna facing up.
6.1
Shade Road Test
The test section is dense with trees, which can verify the
sensitivity of equipment accuracy to occlusion. The route
trajectory is as follows:
Figure 6 trajectory of tree-lined road
6.2
Normal Road Test
The test section is open, the lane line is clearly visible, and
the route trajectory is as follows：
Figure 7 trajectory of normal road
6.3
Viaduct Road Test
The vehicle is driving under the v
iaduct
road, the
trajectory is very smooth.
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