PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-22:42:40
G02     289.3          81.4               14.5 +/-    0.68      14.7 +/-    0.68  0.030 / 0.040
G05     167.2          25.5               21.7 +/-    1.77      41.9 +/-    1.77  0.030 / 0.050
G06     40.2           47.8               12.8 +/-    0.41      16.6 +/-    0.41  0.080 / 0.150
G12     319.8          63.1               13.8 +/-    1.41      15.2 +/-    1.41  0.080 / 0.150
G17     77.8           18.7               12.6 +/-    0.80      28.7 +/-    0.80  0.070 / 0.110
G19     65.4           34.3               13.1 +/-    0.61      21.1 +/-    0.61  0.040 / 0.130
G24     235.4          28.8               19.1 +/-    1.62      34.4 +/-    1.62  0.130 / 0.360
G25     317.7          20.2               12.7 +/-    2.65      27.9 +/-    2.65  0.110 / 0.360