PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-17:58:00
G01     127.9          11.1                0.9 +/-   55.63       2.5 +/-   55.63  0.050 / 0.060
G07     48.1           69.8               14.8 +/-    0.45      15.6 +/-    0.45  0.030 / 0.050
G08     52.8           42.8               13.5 +/-    0.63      18.8 +/-    0.63  0.050 / 0.060
G09     178.5          37.4               20.0 +/-    1.32      30.4 +/-    1.32  0.050 / 0.090
G11     120.7          34.4               18.1 +/-    0.91      29.0 +/-    0.91  0.150 / 0.350
G13     321.5          10.6               -3.5 +/-   24.41      -9.5 +/-   24.41  0.110 / 0.310
G17     201.0          11.0               10.1 +/-   48.20      27.5 +/-   48.20  0.080 / 0.130
G18     105.2          16.1               16.4 +/-    1.22      39.7 +/-    1.22  0.080 / 0.110
G28     275.0          52.6               16.6 +/-    1.00      20.3 +/-    1.00  0.030 / 0.040
G30     333.3          60.5               15.1 +/-    0.93      17.1 +/-    0.93  0.030 / 0.040