PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-04:13:00
G07     41.8           69.4                3.9 +/-    0.39       4.1 +/-    0.39  0.060 / 0.080
G08     53.6           42.3                3.6 +/-    0.93       5.1 +/-    0.93  0.050 / 0.060
G09     179.0          40.8                9.0 +/-    1.66      12.9 +/-    1.66  0.030 / 0.040
G11     122.8          32.2                5.6 +/-    1.44       9.4 +/-    1.44  0.020 / 0.040
G17     199.3          12.0                5.3 +/-    1.68      14.1 +/-    1.68  0.150 / 0.220
G23     160.9          12.1                4.3 +/-    1.33      11.3 +/-    1.33  0.110 / 0.270
G28     271.2          51.3                6.1 +/-    1.13       7.6 +/-    1.13  0.040 / 0.040
G30     330.6          58.4                4.5 +/-    0.62       5.2 +/-    0.62  0.050 / 0.040