PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-03:57:50
G02     42.7           46.9                5.8 +/-    0.62       7.7 +/-    0.62  0.030 / 0.040
G05     112.5          68.0                7.8 +/-    0.90       8.4 +/-    0.90  0.030 / 0.030
G12     192.3          57.9                8.4 +/-    0.67       9.7 +/-    0.67  0.030 / 0.030
G20     208.4          13.2                6.8 +/-    1.91      17.7 +/-    1.91  0.030 / 0.030
G25     282.0          57.1                6.1 +/-    1.26       7.1 +/-    1.26  0.040 / 0.040
G29     313.7          34.9                6.4 +/-    0.88      10.2 +/-    0.88  0.040 / 0.030