PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-00:57:50
G08     267.3          18.8                9.4 +/-    1.60      21.4 +/-    1.60  0.120 / 0.310
G10     56.7           59.7                9.0 +/-    0.76      10.2 +/-    0.76  0.150 / 0.350
G11     311.6          17.5                8.1 +/-    1.05      19.0 +/-    1.05  0.120 / 0.160
G14     265.8          66.6                9.0 +/-    0.81       9.7 +/-    0.81  0.110 / 0.190
G18     90.1           37.5                9.6 +/-    0.78      14.5 +/-    0.78  0.030 / 0.030
G21     153.6          15.5                9.7 +/-    2.82      23.8 +/-    2.82  0.030 / 0.020
G24     41.0           12.6                7.3 +/-    1.91      19.3 +/-    1.91  0.040 / 0.100
G27     231.6          16.5               11.9 +/-    0.96      28.6 +/-    0.96  0.060 / 0.100
G31     180.3          26.8               10.8 +/-    1.53      20.3 +/-    1.53  0.100 / 0.210
G32     320.6          74.7                9.5 +/-    0.76       9.8 +/-    0.76  0.090 / 0.190