PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-11:57:30
G01     112.3          22.5                3.2 +/-    1.05       6.7 +/-    1.05  0.030 / 0.020
G07     97.6           62.0                4.3 +/-    0.62       4.9 +/-    0.62  0.030 / 0.030
G08     42.3           23.1                3.4 +/-    2.11       6.8 +/-    2.11  0.030 / 0.030
G09     174.2          16.5                3.8 +/-    2.09       9.1 +/-    2.09  0.030 / 0.030
G11     94.9           41.9                4.3 +/-    0.44       6.1 +/-    0.44  0.100 / 0.220
G13     313.3          25.3                2.8 +/-    1.40       5.4 +/-    1.40  0.080 / 0.200
G17     203.3          33.7                4.3 +/-    1.75       7.0 +/-    1.75  0.120 / 0.150
G18     85.6           23.1                2.8 +/-    1.67       5.7 +/-    1.67  0.100 / 0.140
G28     306.5          59.7                2.6 +/-    1.33       2.9 +/-    1.33  0.110 / 0.180
G30     358.0          73.7                4.2 +/-    0.58       4.4 +/-    0.58  0.080 / 0.150