PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-13:27:50
G01     82.9           32.8                5.8 +/-    0.58       9.6 +/-    0.58  0.110 / 0.310
G07     130.5          37.5                7.6 +/-    0.91      11.6 +/-    0.91  0.120 / 0.320
G11     61.1           34.6                4.3 +/-    1.09       6.9 +/-    1.09  0.080 / 0.100
G13     289.9          36.2                5.7 +/-    1.18       8.8 +/-    1.18  0.060 / 0.100
G15     313.0          11.1                2.0 +/-    6.75       5.5 +/-    6.75  0.030 / 0.030
G17     219.5          62.1                8.6 +/-    0.66       9.5 +/-    0.66  0.030 / 0.040
G19     217.5          34.4                7.1 +/-    0.86      11.4 +/-    0.86  0.030 / 0.040
G28     1.0            61.0                5.1 +/-    0.52       5.8 +/-    0.52  0.040 / 0.040
G30     116.7          73.4                7.0 +/-    0.48       7.3 +/-    0.48  0.050 / 0.100