PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-17:28:10
G01     120.7          16.8               13.9 +/-    2.24      33.0 +/-    2.24  0.040 / 0.080
G07     75.1           67.7               13.3 +/-    0.57      14.2 +/-    0.57  0.040 / 0.080
G08     46.4           34.9               11.3 +/-    0.53      18.0 +/-    0.53  0.030 / 0.040
G09     177.2          27.7               14.5 +/-    1.69      26.6 +/-    1.69  0.030 / 0.040
G11     110.1          39.2               14.0 +/-    0.92      20.6 +/-    0.92  0.030 / 0.040
G13     318.5          17.9               12.2 +/-    1.34      28.3 +/-    1.34  0.020 / 0.060
G17     202.2          20.3               15.3 +/-    2.79      33.5 +/-    2.79  0.050 / 0.110
G18     96.4           20.2               13.0 +/-    1.00      28.4 +/-    1.00  0.050 / 0.100
G28     289.9          56.8               14.0 +/-    0.81      16.4 +/-    0.81  0.050 / 0.070
G30     345.1          67.7               13.1 +/-    0.70      14.0 +/-    0.70  0.040 / 0.050