PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/30-01:42:40
G07     29.3           68.7                4.2 +/-    0.66       4.5 +/-    0.66  0.030 / 0.040
G08     58.3           44.7                3.0 +/-    1.09       4.1 +/-    1.09  0.030 / 0.040
G09     177.8          46.1                6.6 +/-    2.20       8.8 +/-    2.20  0.080 / 0.120
G11     126.5          29.6                6.3 +/-    1.16      11.1 +/-    1.16  0.090 / 0.110
G18     109.2          11.5                6.5 +/-    2.36      17.7 +/-    2.36  0.060 / 0.110
G23     161.2          19.6                4.9 +/-    0.79      10.8 +/-    0.79  0.040 / 0.090
G27     40.8           18.0                1.9 +/-    0.83       4.3 +/-    0.83  0.110 / 0.390
G28     259.4          44.7                3.2 +/-    0.71       4.3 +/-    0.71  0.110 / 0.440
G30     320.8          51.2                4.3 +/-    0.80       5.3 +/-    0.80  0.050 / 0.060