PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-14:27:50
G01     112.9          22.2               10.0 +/-    0.96      20.8 +/-    0.96  0.030 / 0.030
G07     96.2           62.6                8.5 +/-    0.54       9.5 +/-    0.54  0.030 / 0.040
G08     42.7           25.2                6.8 +/-    0.86      13.1 +/-    0.86  0.100 / 0.190
G09     175.0          18.0                9.2 +/-    0.73      21.2 +/-    0.73  0.110 / 0.240
G11     96.9           42.0                8.7 +/-    0.37      12.3 +/-    0.37  0.040 / 0.090
G13     313.8          24.7                8.4 +/-    2.64      16.4 +/-    2.64  0.040 / 0.090
G17     203.7          31.3               11.0 +/-    2.16      18.8 +/-    2.16  0.030 / 0.040
G18     86.7           23.0                7.0 +/-    1.08      14.2 +/-    1.08  0.020 / 0.040
G28     305.7          59.6                8.4 +/-    0.83       9.6 +/-    0.83  0.060 / 0.070
G30     359.6          73.8                8.2 +/-    0.93       8.5 +/-    0.93  0.050 / 0.060