PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-18:58:10
G01     306.2          34.2                8.9 +/-    1.88      14.4 +/-    1.88  0.070 / 0.150
G10     107.3          38.4                9.8 +/-    1.03      14.7 +/-    1.03  0.090 / 0.110
G11     278.8          28.4                8.3 +/-    2.24      15.1 +/-    2.24  0.050 / 0.070
G14     1.2            66.2                7.7 +/-    0.69       8.3 +/-    0.69  0.040 / 0.070
G18     270.2          51.5                9.8 +/-    0.43      12.2 +/-    0.43  0.070 / 0.220
G20     121.2          13.1               10.9 +/-    1.89      28.4 +/-    1.89  0.080 / 0.160
G22     310.3          26.5                7.1 +/-    1.67      13.5 +/-    1.67  0.040 / 0.050
G25     75.4           15.5                7.8 +/-    1.37      19.1 +/-    1.37  0.040 / 0.050
G31     173.0          62.9                9.9 +/-    1.03      11.0 +/-    1.03  0.120 / 0.160
G32     36.1           52.6                7.4 +/-    0.46       9.1 +/-    0.46  0.110 / 0.160