PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-18:42:50
G01     110.6          23.7               17.4 +/-    2.85      35.1 +/-    2.85  0.060 / 0.100
G07     100.5          61.3               15.7 +/-    0.70      17.7 +/-    0.70  0.060 / 0.110
G08     42.8           25.8               12.8 +/-    0.67      24.6 +/-    0.67  0.040 / 0.060
G09     175.7          17.1               21.2 +/-    2.09      50.2 +/-    2.09  0.040 / 0.040
G11     95.4           42.7               16.7 +/-    0.60      23.3 +/-    0.60  0.100 / 0.190
G13     312.4          26.1               15.8 +/-    2.01      30.0 +/-    2.01  0.100 / 0.180
G17     205.5          30.9               21.5 +/-    1.33      36.9 +/-    1.33  0.040 / 0.060
G18     84.7           23.7               13.3 +/-    1.18      26.9 +/-    1.18  0.040 / 0.080
G28     311.3          60.4               15.8 +/-    0.77      17.9 +/-    0.77  0.030 / 0.050
G30     14.0           76.3               17.2 +/-    0.44      17.7 +/-    0.44  0.030 / 0.030