PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-00:57:30
G05     47.3           20.7                7.7 +/-    2.87      16.7 +/-    2.87  0.140 / 0.320
G13     82.7           36.4               12.1 +/-    0.96      18.8 +/-    0.96  0.330 / 0.560
G15     134.0          48.2               13.4 +/-    0.74      17.3 +/-    0.74  0.140 / 0.130
G16     317.5          11.1                1.8 +/-   16.78       5.0 +/-   16.78  0.250 / 0.240
G20     242.3          28.1               10.8 +/-    2.19      19.7 +/-    2.19  0.070 / 0.120
G21     307.6          42.9               10.4 +/-    1.06      14.5 +/-    1.06  0.060 / 0.070
G25     202.1          15.1               13.1 +/-    1.46      32.4 +/-    1.46  0.070 / 0.100
G26     291.4          21.1                9.8 +/-    1.04      21.1 +/-    1.04  0.100 / 0.090
G29     150.2          79.6               10.2 +/-    0.31      10.4 +/-    0.31  0.040 / 0.040