PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-09:43:10
G01     82.3           32.1                4.4 +/-    1.01       7.3 +/-    1.01  0.030 / 0.050
G07     129.7          39.2                6.6 +/-    0.56       9.7 +/-    0.56  0.040 / 0.060
G11     63.7           39.3                4.0 +/-    1.21       5.9 +/-    1.21  0.050 / 0.050
G13     287.3          38.5                1.2 +/-    2.15       1.8 +/-    2.15  0.050 / 0.050
G15     312.0          11.7                3.0 +/-    2.14       8.0 +/-    2.14  0.110 / 0.130
G17     217.6          56.4                6.8 +/-    0.86       8.0 +/-    0.86  0.140 / 0.130
G18     57.9           22.4                3.5 +/-    1.37       7.3 +/-    1.37  0.160 / 0.400
G19     216.0          33.8                6.4 +/-    2.31      10.4 +/-    2.31  0.170 / 0.460
G28     343.3          61.5                4.1 +/-    0.41       4.6 +/-    0.41  0.030 / 0.020
G30     117.6          73.9                6.5 +/-    0.88       6.7 +/-    0.88  0.030 / 0.030