PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-15:12:30
G02     280.1          79.2                4.8 +/-    0.82       4.8 +/-    0.82  0.190 / 0.130
G05     169.7          24.7                7.3 +/-    1.13      14.4 +/-    1.13  0.140 / 0.150
G06     40.4           45.9                4.0 +/-    0.81       5.4 +/-    0.81  0.030 / 0.040
G12     318.8          67.3                4.1 +/-    0.67       4.4 +/-    0.67  0.030 / 0.030
G17     81.0           14.2                5.1 +/-    1.74      12.9 +/-    1.74  0.090 / 0.130
G19     65.3           35.3                6.6 +/-    1.93      10.3 +/-    1.93  0.090 / 0.130
G24     231.4          27.0                6.8 +/-    1.44      12.7 +/-    1.44  0.110 / 0.170
G25     317.5          24.6                3.5 +/-    2.50       6.9 +/-    2.50  0.100 / 0.190