PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-17:58:00
G01     125.0          13.4               16.8 +/-    1.53      43.3 +/-    1.53  0.060 / 0.050
G07     59.5           69.3               13.5 +/-    0.65      14.4 +/-    0.65  0.040 / 0.070
G08     49.8           39.8               10.4 +/-    1.47      15.1 +/-    1.47  0.030 / 0.020
G09     178.0          33.5               15.5 +/-    1.80      25.3 +/-    1.80  0.030 / 0.030
G11     116.7          36.5               14.3 +/-    0.51      22.1 +/-    0.51  0.040 / 0.030
G13     320.5          13.6                9.9 +/-    3.09      25.6 +/-    3.09  0.050 / 0.040
G17     201.4          14.6               16.7 +/-    3.46      42.0 +/-    3.46  0.100 / 0.170
G18     101.7          17.8               13.4 +/-    1.73      31.0 +/-    1.73  0.100 / 0.220
G28     280.9          54.4               13.0 +/-    2.97      15.6 +/-    2.97  0.110 / 0.060
G30     337.8          63.5               13.1 +/-    0.63      14.4 +/-    0.63  0.070 / 0.060