PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-16:42:20
G02     229.1          68.1                9.6 +/-    0.98      10.3 +/-    0.98  0.130 / 0.350
G05     174.3          11.3               -3.7 +/-   21.50     -10.1 +/-   21.50  0.130 / 0.390
G06     42.9           61.3                9.0 +/-    0.57      10.1 +/-    0.57  0.120 / 0.100
G12     322.7          51.6                8.7 +/-    0.62      10.8 +/-    0.62  0.060 / 0.090
G17     67.4           24.1                8.4 +/-    1.18      16.8 +/-    1.18  0.030 / 0.050
G19     48.3           44.9                8.9 +/-    0.97      11.9 +/-    0.97  0.030 / 0.050
G24     248.9          37.5                9.7 +/-    1.62      14.7 +/-    1.62  0.040 / 0.030