PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-08:12:50
G08     268.9          17.5                6.5 +/-    1.43      15.2 +/-    1.43  0.050 / 0.060
G10     62.7           58.1                4.1 +/-    0.54       4.7 +/-    0.54  0.040 / 0.060
G11     311.6          16.9               -1.5 +/-   13.16      -3.6 +/-   13.16  0.120 / 0.340
G14     263.0          62.6                6.0 +/-    0.78       6.7 +/-    0.78  0.130 / 0.340
G18     312.2          31.8                5.7 +/-    3.42       9.6 +/-    3.42  0.130 / 0.160
G20     102.2          21.7                4.2 +/-    1.50       8.8 +/-    1.50  0.160 / 0.210
G21     155.0          14.9                5.7 +/-    1.90      14.3 +/-    1.90  0.030 / 0.030
G27     230.9          15.2                6.7 +/-    1.21      16.5 +/-    1.21  0.040 / 0.040
G31     176.5          33.2                5.1 +/-    1.51       8.4 +/-    1.51  0.090 / 0.210
G32     348.6          73.1                5.3 +/-    0.71       5.5 +/-    0.71  0.120 / 0.230