PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-20:27:30
G02     253.9          77.9               10.2 +/-    0.38      10.4 +/-    0.38  0.030 / 0.040
G05     169.9          20.0               11.9 +/-    1.53      26.3 +/-    1.53  0.030 / 0.040
G06     40.3           52.8               10.1 +/-    0.52      12.4 +/-    0.52  0.120 / 0.180
G12     321.9          58.7                9.1 +/-    0.97      10.4 +/-    0.97  0.150 / 0.190
G17     73.9           20.7                9.8 +/-    0.79      21.2 +/-    0.79  0.110 / 0.130
G19     59.3           38.2                9.8 +/-    1.17      14.7 +/-    1.17  0.130 / 0.150
G24     240.0          32.3               10.6 +/-    1.42      17.7 +/-    1.42  0.090 / 0.150
G25     317.3          15.7                7.6 +/-    2.20      18.5 +/-    2.20  0.110 / 0.140