PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-11:27:50
G07     42.3           69.7                4.9 +/-    0.59       5.2 +/-    0.59  0.030 / 0.040
G08     52.2           40.6                3.4 +/-    1.08       4.9 +/-    1.08  0.030 / 0.040
G09     176.6          37.6                5.9 +/-    1.20       9.0 +/-    1.20  0.030 / 0.030
G11     120.6          33.4                5.6 +/-    0.94       9.2 +/-    0.94  0.030 / 0.030
G17     199.1          12.6                0.7 +/-    8.38       1.7 +/-    8.38  0.080 / 0.100
G18     106.4          14.9                3.6 +/-    1.19       9.0 +/-    1.19  0.140 / 0.090
G23     160.8          11.2                3.2 +/-    2.62       8.6 +/-    2.62  0.240 / 0.330
G27     37.8           10.2                3.0 +/-    3.23       8.4 +/-    3.23  0.120 / 0.330
G28     270.6          50.8                5.6 +/-    3.04       7.0 +/-    3.04  0.070 / 0.310
G30     327.3          56.4                3.8 +/-    0.67       4.5 +/-    0.67  0.070 / 0.330