PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-12:57:50
G10     302.2          53.1                3.3 +/-    0.75       4.1 +/-    0.75  0.060 / 0.070
G14     211.5          13.9                2.1 +/-    3.04       5.4 +/-    3.04  0.070 / 0.060
G15     45.5           23.6                1.5 +/-    2.28       3.1 +/-    2.28  0.030 / 0.040
G20     72.0           20.4                2.8 +/-    0.94       6.2 +/-    0.94  0.030 / 0.040
G21     109.7          69.3                4.2 +/-    0.37       4.5 +/-    0.37  0.090 / 0.190
G24     94.5           27.8                2.3 +/-    2.20       4.3 +/-    2.20  0.100 / 0.190
G27     295.3          36.2                5.1 +/-    1.94       7.9 +/-    1.94  0.090 / 0.470
G32     212.3          36.1                6.1 +/-    1.65       9.5 +/-    1.65  0.290 / 0.360