PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/26-22:42:40
G07     24.4           69.0                9.4 +/-    1.19      10.0 +/-    1.19  0.170 / 0.140
G08     61.3           48.3                8.7 +/-    0.95      11.2 +/-    0.95  0.130 / 0.090
G09     180.4          46.8               10.0 +/-    1.39      13.2 +/-    1.39  0.280 / 0.250
G11     130.4          28.8               12.7 +/-    0.74      22.7 +/-    0.74  0.130 / 0.370
G23     159.7          14.5               10.5 +/-    1.94      26.5 +/-    1.94  0.050 / 0.050
G27     39.0           13.7                6.9 +/-    2.69      17.7 +/-    2.69  0.050 / 0.050
G28     264.0          48.3                9.5 +/-    3.84      12.3 +/-    3.84  0.030 / 0.030
G30     328.0          56.5                8.2 +/-    0.77       9.6 +/-    0.77  0.020 / 0.040