PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-18:58:00
G01     103.7          27.3               18.2 +/-    1.13      33.7 +/-    1.13  0.090 / 0.140
G07     111.5          56.2               17.1 +/-    0.54      20.1 +/-    0.54  0.100 / 0.160
G08     42.0           19.9               10.4 +/-    0.95      22.8 +/-    0.95  0.050 / 0.050
G09     174.4          10.9               24.6 +/-    3.53      67.4 +/-    3.53  0.050 / 0.070
G11     85.7           43.1               16.8 +/-    1.33      23.2 +/-    1.33  0.100 / 0.160
G13     307.0          30.4               15.3 +/-    1.32      26.6 +/-    1.32  0.090 / 0.160
G17     208.2          37.9               20.8 +/-    0.81      31.4 +/-    0.81  0.040 / 0.080
G18     77.2           24.7               15.2 +/-    0.83      29.9 +/-    0.83  0.040 / 0.090
G28     325.2          61.5               15.7 +/-    1.02      17.6 +/-    1.02  0.030 / 0.040
G30     46.6           79.2               16.3 +/-    0.77      16.5 +/-    0.77  0.030 / 0.040