PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-08:27:40
G01     118.6          16.7                4.4 +/-    2.01      10.5 +/-    2.01  0.040 / 0.040
G07     80.4           65.7                6.7 +/-    0.41       7.2 +/-    0.41  0.030 / 0.030
G08     46.4           35.0                3.5 +/-    0.48       5.6 +/-    0.48  0.030 / 0.040
G09     176.3          27.0                8.2 +/-    1.82      15.2 +/-    1.82  0.030 / 0.030
G11     110.3          40.6                7.5 +/-    1.07      10.8 +/-    1.07  0.080 / 0.120
G13     317.8          19.6                4.3 +/-    1.34       9.5 +/-    1.34  0.110 / 0.140
G17     201.3          21.0                5.9 +/-    1.66      12.7 +/-    1.66  0.100 / 0.370
G18     94.9           20.4                5.7 +/-    0.72      12.4 +/-    0.72  0.110 / 0.370
G28     280.5          51.7                8.1 +/-    1.00      10.0 +/-    1.00  0.090 / 0.130
G30     340.7          66.5                2.8 +/-    0.54       3.0 +/-    0.54  0.060 / 0.100