PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-14:27:50
G01     109.4          23.3                9.5 +/-    0.61      19.3 +/-    0.61  0.030 / 0.040
G07     104.7          56.4                9.1 +/-    0.63      10.6 +/-    0.63  0.040 / 0.050
G08     42.6           25.0                6.8 +/-    1.77      13.3 +/-    1.77  0.040 / 0.060
G09     176.0          17.9               10.0 +/-    1.96      23.1 +/-    1.96  0.040 / 0.060
G11     93.0           43.3                9.9 +/-    0.69      13.7 +/-    0.69  0.040 / 0.090
G13     311.6          27.5                8.2 +/-    1.33      15.1 +/-    1.33  0.040 / 0.090
G17     204.3          32.2               10.4 +/-    1.04      17.4 +/-    1.04  0.090 / 0.250
G18     82.7           23.5                7.5 +/-    1.10      15.2 +/-    1.10  0.070 / 0.210
G28     300.7          57.5                8.7 +/-    0.64      10.1 +/-    0.64  0.050 / 0.120
G30     19.9           77.1                9.1 +/-    0.88       9.3 +/-    0.88  0.060 / 0.110