PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/15-10:57:50
G07     14.0           67.9                5.0 +/-    0.67       5.3 +/-    0.67  0.050 / 0.050
G08     62.5           47.1                5.1 +/-    1.18       6.7 +/-    1.18  0.040 / 0.040
G09     177.4          48.2                6.8 +/-    0.97       8.8 +/-    0.97  0.030 / 0.030
G11     129.6          27.3                3.7 +/-    0.97       7.0 +/-    0.97  0.030 / 0.030
G18     114.7          9.7                -7.8 +/-   15.14     -21.9 +/-   15.14  0.210 / 0.170
G23     160.3          20.8                4.3 +/-    2.28       9.2 +/-    2.28  0.160 / 0.250
G27     41.0           18.1                4.6 +/-    1.95      10.7 +/-    1.95  0.120 / 0.170
G28     257.6          44.7                5.7 +/-    3.68       7.7 +/-    3.68  0.130 / 0.210
G30     318.1          48.5                3.1 +/-    0.72       4.0 +/-    0.72  0.120 / 0.290