PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-23:12:50
G01     320.8          11.2               -7.5 +/-   38.21     -20.5 +/-   38.21  0.220 / 0.330
G08     263.6          17.0               13.1 +/-    2.36      31.0 +/-    2.36  0.220 / 0.340
G10     65.1           58.0               10.7 +/-    0.61      12.4 +/-    0.61  0.060 / 0.100
G11     309.1          19.6               11.0 +/-    0.93      24.4 +/-    0.93  0.060 / 0.110
G14     276.0          68.6               10.6 +/-    0.82      11.3 +/-    0.82  0.240 / 0.540
G18     94.7           34.1               11.0 +/-    0.59      17.8 +/-    0.59  0.240 / 0.520
G21     154.0          10.4               14.2 +/-    4.32      39.3 +/-    4.32  0.160 / 0.420
G27     228.5          13.6               14.2 +/-    4.28      36.6 +/-    4.28  0.170 / 0.360
G31     180.7          30.0               14.2 +/-    1.86      25.0 +/-    1.86  0.050 / 0.050
G32     336.7          73.4               10.5 +/-    0.48      10.9 +/-    0.48  0.050 / 0.060