PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-14:13:10
G02     201.7          25.8               10.1 +/-    2.19      19.5 +/-    2.19  0.340 / 0.400
G06     168.9          60.3                8.3 +/-    0.69       9.4 +/-    0.69  0.220 / 0.280
G17     31.7           52.8                6.8 +/-    0.59       8.3 +/-    0.59  0.050 / 0.090
G19     349.1          68.6                6.7 +/-    0.74       7.2 +/-    0.74  0.070 / 0.090
G24     306.7          32.6                5.0 +/-    2.46       8.3 +/-    2.46  0.050 / 0.060
G28     95.5           35.5                7.4 +/-    1.31      11.7 +/-    1.31  0.040 / 0.040
G30     158.1          10.0                8.9 +/-    2.73      24.7 +/-    2.73  0.110 / 0.100