PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-17:57:50
G01     123.5          14.6               12.9 +/-    1.74      32.3 +/-    1.74  0.040 / 0.060
G07     65.1           68.9               10.9 +/-    0.27      11.6 +/-    0.27  0.050 / 0.060
G08     48.6           38.3                8.6 +/-    0.86      12.9 +/-    0.86  0.030 / 0.030
G09     177.8          31.5               10.4 +/-    1.19      17.6 +/-    1.19  0.030 / 0.030
G11     114.6          37.5               11.6 +/-    0.95      17.6 +/-    0.95  0.040 / 0.030
G13     319.9          15.1               10.0 +/-    3.06      24.8 +/-    3.06  0.030 / 0.030
G17     201.7          16.4               11.6 +/-    3.53      27.8 +/-    3.53  0.060 / 0.080
G18     100.0          18.7               11.3 +/-    1.62      25.6 +/-    1.62  0.090 / 0.090
G28     283.9          55.3               11.0 +/-    2.07      13.1 +/-    2.07  0.110 / 0.220
G30     340.3          65.0               11.3 +/-    0.64      12.4 +/-    0.64  0.100 / 0.160