PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-00:58:10
G02     34.5           54.3                9.7 +/-    0.86      11.6 +/-    0.86  0.020 / 0.030
G05     134.8          63.1               11.7 +/-    0.61      13.0 +/-    0.61  0.030 / 0.040
G06     54.4           14.7                8.4 +/-    2.55      21.2 +/-    2.55  0.020 / 0.030
G12     196.9          66.7               11.3 +/-    0.47      12.2 +/-    0.47  0.030 / 0.030
G19     100.1          10.6               12.9 +/-    1.60      35.4 +/-    1.60  0.050 / 0.050
G25     296.7          53.3               10.0 +/-    2.92      12.1 +/-    2.92  0.040 / 0.050
G29     307.4          27.7                9.5 +/-    1.58      17.4 +/-    1.58  0.160 / 0.210