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               16.1 +/-    1.25      29.8 +/-    1.25  0.260 / 0.120
G07     111.5          56.2               16.7 +/-    0.39      19.7 +/-    0.39  0.130 / 0.190
G08     42.0           19.9               11.0 +/-    1.93      24.3 +/-    1.93  0.030 / 0.030
G09     174.4          10.9               23.7 +/-    2.06      64.8 +/-    2.06  0.030 / 0.030
G11     85.7           43.1               16.3 +/-    0.80      22.5 +/-    0.80  0.030 / 0.040
G13     307.0          30.4               15.8 +/-    0.63      27.5 +/-    0.63  0.030 / 0.030
G17     208.2          37.9               20.7 +/-    1.17      31.1 +/-    1.17  0.060 / 0.130
G18     77.2           24.7               14.3 +/-    1.45      28.0 +/-    1.45  0.070 / 0.130
G28     325.2          61.5               15.1 +/-    0.56      17.0 +/-    0.56  0.090 / 0.110
G30     46.6           79.2               16.7 +/-    0.53      16.9 +/-    0.53  0.080 / 0.090