PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-14:27:40
G01     121.0          15.5                8.7 +/-    1.20      21.5 +/-    1.20  0.080 / 0.090
G07     80.7           64.3                9.8 +/-    0.76      10.8 +/-    0.76  0.070 / 0.110
G08     47.1           35.8                8.1 +/-    0.88      12.7 +/-    0.88  0.060 / 0.080
G09     178.0          30.7                9.9 +/-    2.45      17.2 +/-    2.45  0.060 / 0.090
G11     110.3          39.4               11.1 +/-    1.23      16.2 +/-    1.23  0.020 / 0.040
G13     318.7          17.9                8.3 +/-    3.58      19.2 +/-    3.58  0.030 / 0.030
G17     200.9          19.5               12.2 +/-    3.50      27.3 +/-    3.50  0.180 / 0.340
G18     96.2           19.5                8.4 +/-    1.04      18.7 +/-    1.04  0.130 / 0.330
G28     279.5          52.0                9.2 +/-    2.28      11.3 +/-    2.28  0.110 / 0.190
G30     346.4          68.1                9.0 +/-    0.51       9.6 +/-    0.51  0.160 / 0.290