PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-09:27:50
G07     48.1           69.5                6.0 +/-    0.55       6.3 +/-    0.55  0.040 / 0.030
G08     51.0           39.6                4.5 +/-    1.13       6.7 +/-    1.13  0.030 / 0.030
G09     174.9          34.1                6.1 +/-    1.00       9.9 +/-    1.00  0.060 / 0.250
G11     119.1          34.4                7.8 +/-    0.57      12.5 +/-    0.57  0.110 / 0.200
G17     199.1          14.1                4.3 +/-    3.41      11.0 +/-    3.41  0.210 / 0.420
G18     104.5          15.6                5.1 +/-    2.29      12.6 +/-    2.29  0.170 / 0.400
G23     161.0          10.2                3.1 +/-    4.90       8.6 +/-    4.90  0.100 / 0.110
G27     37.6           9.7                 2.1 +/-    3.01       6.0 +/-    3.01  0.070 / 0.120
G28     272.1          51.1                6.6 +/-    3.27       8.3 +/-    3.27  0.030 / 0.030
G30     328.6          57.6                4.6 +/-    0.45       5.4 +/-    0.45  0.030 / 0.030