PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-18:12:50
G01     101.7          28.2               13.9 +/-    1.66      25.2 +/-    1.66  0.080 / 0.150
G07     114.1          54.6               13.6 +/-    0.32      16.3 +/-    0.32  0.080 / 0.160
G08     41.9           17.8                9.7 +/-    0.93      22.6 +/-    0.93  0.030 / 0.030
G11     82.7           42.9               13.4 +/-    0.78      18.7 +/-    0.78  0.040 / 0.040
G13     305.3          31.5               13.4 +/-    0.88      22.7 +/-    0.88  0.020 / 0.050
G17     209.0          40.4               15.4 +/-    1.33      22.3 +/-    1.33  0.030 / 0.060
G18     75.0           24.8               13.4 +/-    1.05      26.3 +/-    1.05  0.050 / 0.070
G19     210.9          16.3                1.0 +/-   18.99       2.3 +/-   18.99  0.050 / 0.090
G28     328.8          61.7               12.3 +/-    1.05      13.8 +/-    1.05  0.060 / 0.060
G30     55.4           79.5               13.3 +/-    0.84      13.5 +/-    0.84  0.050 / 0.050