PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-23:12:30
G02     227.7          70.7               15.2 +/-    0.33      16.0 +/-    0.33  0.030 / 0.050
G05     173.4          11.5               10.9 +/-   33.42      29.4 +/-   33.42  0.030 / 0.060
G06     43.5           64.2               13.9 +/-    0.32      15.3 +/-    0.32  0.210 / 0.380
G12     321.2          46.0               13.9 +/-    0.96      18.4 +/-    0.96  0.190 / 0.360
G17     64.0           28.9               12.4 +/-    0.85      22.2 +/-    0.85  0.070 / 0.090
G19     49.2           43.9               13.9 +/-    0.63      19.1 +/-    0.63  0.060 / 0.080
G24     252.3          38.1               15.8 +/-    1.85      23.7 +/-    1.85  0.030 / 0.040