PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-04:57:50
G08     271.3          20.4                4.1 +/-    1.17       8.9 +/-    1.17  0.040 / 0.020
G10     47.8           61.2                4.0 +/-    0.76       4.5 +/-    0.76  0.030 / 0.020
G11     313.5          15.6                2.9 +/-    2.54       7.2 +/-    2.54  0.030 / 0.020
G14     257.0          64.1                5.1 +/-    0.62       5.6 +/-    0.62  0.030 / 0.030
G18     84.6           41.8                3.2 +/-    0.88       4.5 +/-    0.88  0.080 / 0.200
G21     153.1          21.2                4.0 +/-    3.19       8.6 +/-    3.19  0.120 / 0.230
G24     43.0           15.6                4.6 +/-    1.63      11.2 +/-    1.63  0.250 / 0.240
G27     234.9          19.4                6.2 +/-    4.42      13.8 +/-    4.42  0.150 / 0.190
G31     179.3          24.5                3.3 +/-    2.77       6.4 +/-    2.77  0.080 / 0.060
G32     312.5          75.8                6.2 +/-    0.43       6.4 +/-    0.43  0.070 / 0.060