PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-14:58:00
G01     110.7          22.6                9.9 +/-    1.06      20.4 +/-    1.06  0.030 / 0.040
G07     103.0          57.0                9.6 +/-    0.25      11.2 +/-    0.25  0.030 / 0.040
G08     42.8           25.7                8.2 +/-    0.82      15.8 +/-    0.82  0.050 / 0.070
G09     176.3          19.2                9.9 +/-    1.74      22.3 +/-    1.74  0.050 / 0.070
G11     94.7           43.1                9.3 +/-    0.82      12.9 +/-    0.82  0.040 / 0.090
G13     312.5          26.6                8.3 +/-    1.49      15.6 +/-    1.49  0.040 / 0.090
G17     203.8          31.3               11.2 +/-    1.56      19.1 +/-    1.56  0.080 / 0.190
G18     84.0           23.2                7.4 +/-    0.73      15.1 +/-    0.73  0.080 / 0.210
G28     298.7          57.1                9.5 +/-    0.86      11.0 +/-    0.86  0.050 / 0.110
G30     17.0           76.5                9.7 +/-    1.02      10.0 +/-    1.02  0.050 / 0.100