PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-15:58:10
G02     205.3          37.3               14.1 +/-    1.69      21.5 +/-    1.69  0.060 / 0.090
G06     151.5          73.7               12.4 +/-    1.18      12.8 +/-    1.18  0.060 / 0.090
G12     310.5          19.3               11.5 +/-    1.53      25.8 +/-    1.53  0.120 / 0.180
G17     42.8           43.5                8.9 +/-    0.67      12.2 +/-    0.67  0.110 / 0.180
G19     15.3           61.1               10.1 +/-    0.46      11.3 +/-    0.46  0.030 / 0.070
G24     294.5          39.1               10.2 +/-    1.99      15.1 +/-    1.99  0.030 / 0.060
G28     107.4          27.6                9.4 +/-    1.71      17.3 +/-    1.71  0.040 / 0.040