PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-05:58:10
G02     281.3          82.1                2.0 +/-    0.71       2.0 +/-    0.71  0.040 / 0.040
G05     168.3          22.9                4.4 +/-    1.67       9.1 +/-    1.67  0.040 / 0.040
G06     39.3           54.3                2.8 +/-    0.32       3.4 +/-    0.32  0.040 / 0.130
G12     320.5          57.4                1.2 +/-    0.94       1.4 +/-    0.94  0.040 / 0.130
G17     76.2           19.4                2.5 +/-    1.11       5.6 +/-    1.11  0.090 / 0.140
G19     64.4           34.1                1.8 +/-    0.86       3.0 +/-    0.86  0.090 / 0.140
G24     239.3          30.8                6.2 +/-    2.40      10.6 +/-    2.40  0.040 / 0.040
G25     317.7          17.6                2.0 +/-    1.70       4.6 +/-    1.70  0.030 / 0.040