PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-04:58:00
G01     232.3          22.8               10.8 +/-    1.78      22.1 +/-    1.78  0.030 / 0.060
G03     304.5          59.5                7.4 +/-    0.89       8.4 +/-    0.89  0.050 / 0.040
G14     80.2           27.7                4.4 +/-    1.52       8.1 +/-    1.52  0.070 / 0.110
G16     155.9          35.5                8.7 +/-    0.92      13.6 +/-    0.92  0.090 / 0.110
G22     246.4          75.4                6.9 +/-    0.33       7.1 +/-    0.33  0.080 / 0.140
G23     300.3          30.2                6.5 +/-    1.14      11.3 +/-    1.14  0.130 / 0.130
G26     117.6          51.5                8.2 +/-    0.57      10.2 +/-    0.57  0.020 / 0.030
G31     41.6           41.7                5.3 +/-    1.13       7.5 +/-    1.13  0.030 / 0.030
G32     92.2           13.3                5.5 +/-    2.20      14.3 +/-    2.20  0.060 / 0.120