PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-21:13:10
G02     58.5           34.3                9.6 +/-    1.46      15.4 +/-    1.46  0.030 / 0.040
G05     58.4           61.4                9.9 +/-    0.47      11.1 +/-    0.47  0.030 / 0.040
G12     182.1          29.9               13.1 +/-    1.45      23.0 +/-    1.45  0.180 / 0.370
G13     128.0          15.1               13.5 +/-    1.92      33.5 +/-    1.92  0.150 / 0.310
G15     166.0          10.8               -2.0 +/-   26.74      -5.4 +/-   26.74  0.060 / 0.110
G21     270.8          16.3               11.7 +/-    1.47      28.1 +/-    1.47  0.060 / 0.110
G25     236.0          51.9               11.3 +/-    3.22      14.0 +/-    3.22  0.050 / 0.050
G29     327.3          53.1                9.4 +/-    1.16      11.5 +/-    1.16  0.060 / 0.070