PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-10:57:40
G10     249.1          24.9                5.6 +/-    1.54      10.9 +/-    1.54  0.030 / 0.040
G13     55.8           31.6                3.3 +/-    1.45       5.5 +/-    1.45  0.040 / 0.040
G15     87.3           56.8                5.2 +/-    0.86       6.0 +/-    0.86  0.060 / 0.040
G16     298.9          14.8                1.2 +/-    2.27       2.9 +/-    2.27  0.030 / 0.050
G20     36.5           55.5                3.7 +/-    0.97       4.3 +/-    0.97  0.080 / 0.470
G21     334.7          60.6                3.2 +/-    0.41       3.6 +/-    0.41  0.090 / 0.430
G26     269.7          16.2                5.7 +/-    1.46      13.7 +/-    1.46  0.170 / 0.130
G29     163.5          50.2                7.0 +/-    0.55       8.9 +/-    0.55  0.130 / 0.130