PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-06:12:40
G01     74.9           33.2                2.2 +/-    0.95       3.5 +/-    0.95  0.030 / 0.040
G07     135.3          33.6                5.8 +/-    0.69       9.5 +/-    0.69  0.030 / 0.040
G11     56.8           33.0                1.9 +/-    1.10       3.1 +/-    1.10  0.110 / 0.210
G13     280.5          37.2                5.3 +/-    2.02       8.2 +/-    2.02  0.070 / 0.210
G15     305.2          14.9                1.2 +/-    2.18       2.9 +/-    2.18  0.050 / 0.020
G17     228.3          67.0                6.3 +/-    0.96       6.8 +/-    0.96  0.040 / 0.020
G19     221.8          40.1                8.5 +/-    1.75      12.4 +/-    1.75  0.090 / 0.090
G28     14.7           59.8                2.2 +/-    0.66       2.5 +/-    0.66  0.190 / 0.290
G30     131.0          63.6                4.8 +/-    0.32       5.3 +/-    0.32  0.060 / 0.070