PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-22:42:50
G02     289.3          81.4               14.9 +/-    0.93      15.0 +/-    0.93  0.030 / 0.030
G05     167.2          25.5               21.1 +/-    1.35      40.8 +/-    1.35  0.030 / 0.030
G06     40.2           47.8               12.7 +/-    0.96      16.5 +/-    0.96  0.090 / 0.150
G12     319.8          63.1               14.5 +/-    1.00      16.1 +/-    1.00  0.090 / 0.150
G17     77.8           18.7               13.4 +/-    1.95      30.5 +/-    1.95  0.080 / 0.130
G19     65.4           34.3               15.2 +/-    2.15      24.4 +/-    2.15  0.080 / 0.130
G24     235.4          28.8               19.5 +/-    0.88      35.0 +/-    0.88  0.300 / 0.260
G25     317.7          20.2               13.2 +/-    1.72      28.9 +/-    1.72  0.260 / 0.290