PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-04:13:00
G02     37.8           51.4                4.8 +/-    0.73       5.9 +/-    0.73  0.030 / 0.030
G05     128.7          65.0                7.1 +/-    0.99       7.7 +/-    0.99  0.030 / 0.030
G06     55.5           13.9                1.6 +/-    1.73       4.0 +/-    1.73  0.030 / 0.050
G12     197.2          64.8                6.1 +/-    1.48       6.7 +/-    1.48  0.030 / 0.050
G20     206.3          11.1                0.6 +/-   19.59       1.7 +/-   19.59  0.030 / 0.050
G25     293.0          54.6                5.9 +/-    0.68       7.0 +/-    0.68  0.040 / 0.040
G29     309.6          30.4                5.7 +/-    0.92       9.8 +/-    0.92  0.210 / 0.540