PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-07:12:40
G08     319.3          11.9                2.9 +/-    3.06       7.7 +/-    3.06  0.090 / 0.220
G10     313.6          56.3                4.4 +/-    0.92       5.2 +/-    0.92  0.110 / 0.290
G14     214.2          17.2                7.4 +/-    1.87      17.4 +/-    1.87  0.030 / 0.040
G15     45.6           18.9                1.8 +/-    1.04       4.0 +/-    1.04  0.040 / 0.040
G20     55.4           48.4                4.6 +/-    1.10       5.9 +/-    1.10  0.050 / 0.090
G21     121.1          66.6                6.5 +/-    0.68       7.0 +/-    0.68  0.060 / 0.070
G24     85.5           29.4                4.7 +/-    0.94       8.4 +/-    0.94  0.070 / 0.100
G27     287.5          37.5                4.3 +/-    1.45       6.5 +/-    1.45  0.070 / 0.120
G32     215.7          44.2                7.8 +/-    0.80      10.6 +/-    0.80  0.030 / 0.040