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Table 6 Average number of visible satellites of two receivers during two test periods

From: Impact of China’s high speed train window glass on GNSS signals and positioning performance

Periods

Receivers

GPS

GLONASS

Galileo

BDS

GNSS

Period 1 (GPS time: 3:00:00–9:00:00)

Receiver 1 (without glass)

10

7

8

12

37

Receiver 2 (with glass)

2

3

4

4

13

Period 2 (GPS time: 11:00:00–14:00:00)

Receiver 1 (without glass)

11

7

7

11

36

Receiver 2 (without glass)

11

8

7

11

37