PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-20:28:10
G01     120.7          16.8               20.9 +/-    2.16      49.6 +/-    2.16  0.040 / 0.060
G07     74.9           67.7               17.6 +/-    0.37      18.8 +/-    0.37  0.040 / 0.070
G08     47.3           37.2               14.4 +/-    0.71      21.9 +/-    0.71  0.140 / 0.260
G09     177.8          28.5               21.6 +/-    0.99      39.0 +/-    0.99  0.170 / 0.220
G11     111.6          39.1               20.0 +/-    0.71      29.5 +/-    0.71  0.030 / 0.040
G13     318.7          17.6               15.9 +/-    1.99      37.0 +/-    1.99  0.030 / 0.040
G17     202.6          18.9               24.4 +/-    1.63      55.1 +/-    1.63  0.110 / 0.190
G18     96.7           20.1               16.0 +/-    1.80      35.1 +/-    1.80  0.080 / 0.230
G28     290.3          56.9               17.6 +/-    1.53      20.5 +/-    1.53  0.030 / 0.040
G30     348.6          68.7               17.5 +/-    0.66      18.6 +/-    0.66  0.030 / 0.030