PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-15:43:10
G02     224.5          67.1               13.5 +/-    0.70      14.5 +/-    0.70  0.070 / 0.060
G06     45.2           67.6               11.2 +/-    0.57      12.1 +/-    0.57  0.050 / 0.060
G12     320.8          43.8                9.7 +/-    1.30      13.3 +/-    1.30  0.050 / 0.100
G17     66.1           24.9               10.2 +/-    0.69      20.0 +/-    0.69  0.060 / 0.100
G19     50.9           42.1                9.4 +/-    0.32      13.2 +/-    0.32  0.040 / 0.030
G24     256.7          38.9               12.5 +/-    0.95      18.5 +/-    0.95  0.030 / 0.030