PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-13:28:00
G01     118.9          18.0                7.7 +/-    1.47      17.8 +/-    1.47  0.030 / 0.040
G07     81.1           66.5                8.9 +/-    0.34       9.6 +/-    0.34  0.030 / 0.030
G08     44.6           30.6                7.2 +/-    1.11      12.4 +/-    1.11  0.030 / 0.030
G09     175.7          24.2                9.7 +/-    1.04      19.2 +/-    1.04  0.030 / 0.040
G11     105.7          40.0                9.4 +/-    1.09      13.7 +/-    1.09  0.100 / 0.140
G13     317.5          19.8                5.6 +/-    1.59      12.4 +/-    1.59  0.110 / 0.130
G17     201.6          24.9                8.8 +/-    3.64      17.1 +/-    3.64  0.290 / 0.260
G18     93.7           20.9                6.6 +/-    1.67      14.2 +/-    1.67  0.170 / 0.360
G28     292.9          57.4                6.7 +/-    1.37       7.8 +/-    1.37  0.110 / 0.190
G30     345.0          68.1                7.5 +/-    0.23       8.0 +/-    0.23  0.110 / 0.240