PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-16:42:50
G02     204.2          33.2               12.9 +/-    2.24      21.2 +/-    2.24  0.070 / 0.100
G06     152.8          71.0               10.8 +/-    0.96      11.3 +/-    0.96  0.110 / 0.090
G12     309.1          19.3                8.6 +/-    1.93      19.3 +/-    1.93  0.030 / 0.020
G17     37.1           48.2                7.6 +/-    1.58       9.8 +/-    1.58  0.030 / 0.030
G19     354.5          66.2                8.7 +/-    0.36       9.4 +/-    0.36  0.120 / 0.170
G24     295.9          39.4                8.8 +/-    5.62      12.9 +/-    5.62  0.070 / 0.210
G28     103.0          30.9                8.2 +/-    1.07      14.2 +/-    1.07  0.040 / 0.030