PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-14:57:40
G02     203.9          34.3               11.8 +/-    2.17      19.0 +/-    2.17  0.150 / 0.330
G06     159.7          69.9               11.2 +/-    0.92      11.8 +/-    0.92  0.110 / 0.280
G12     308.5          16.2                8.0 +/-    3.85      19.4 +/-    3.85  0.060 / 0.080
G17     39.7           46.1                9.4 +/-    0.82      12.4 +/-    0.82  0.060 / 0.100
G19     8.9            63.4               10.3 +/-    0.40      11.4 +/-    0.40  0.040 / 0.060
G24     298.5          37.6               10.2 +/-    1.92      15.4 +/-    1.92  0.030 / 0.060
G28     104.2          29.9               11.7 +/-    0.69      20.5 +/-    0.69  0.040 / 0.040