PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-18:58:00
G01     97.6           29.8               12.0 +/-    1.12      21.1 +/-    1.12  0.200 / 0.350
G07     118.8          51.5               12.4 +/-    0.51      15.4 +/-    0.51  0.070 / 0.210
G08     42.0           15.0                8.4 +/-    2.22      20.9 +/-    2.22  0.020 / 0.030
G11     77.8           42.4               10.9 +/-    1.12      15.2 +/-    1.12  0.030 / 0.020
G13     301.7          33.4                8.8 +/-    2.68      14.5 +/-    2.68  0.020 / 0.040
G17     211.1          43.7               12.9 +/-    0.61      17.7 +/-    0.61  0.020 / 0.050
G18     71.0           24.8               11.0 +/-    1.06      21.7 +/-    1.06  0.040 / 0.050
G19     212.1          19.9               12.4 +/-    2.08      27.4 +/-    2.08  0.030 / 0.040
G28     336.7          61.9                9.8 +/-    0.38      10.9 +/-    0.38  0.080 / 0.130
G30     78.4           78.7               12.7 +/-    0.63      12.9 +/-    0.63  0.070 / 0.140