PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-00:27:40
G02     289.8          81.8               12.4 +/-    0.62      12.5 +/-    0.62  0.030 / 0.040
G05     167.2          25.1               17.8 +/-    1.10      34.6 +/-    1.10  0.030 / 0.040
G06     40.1           49.0               12.5 +/-    0.57      16.0 +/-    0.57  0.070 / 0.100
G12     320.0          61.4               13.9 +/-    0.87      15.6 +/-    0.87  0.070 / 0.090
G17     76.7           20.2               14.5 +/-    1.64      31.8 +/-    1.64  0.070 / 0.120
G19     65.2           34.2               13.8 +/-    0.75      22.2 +/-    0.75  0.060 / 0.150
G24     236.4          29.3               14.2 +/-    1.55      25.3 +/-    1.55  0.110 / 0.250
G25     317.7          19.3               11.7 +/-    1.52      26.2 +/-    1.52  0.110 / 0.310