PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-04:12:50
G01     70.6           32.8                8.4 +/-    0.78      14.0 +/-    0.78  0.060 / 0.140
G07     137.3          28.4               10.2 +/-    1.17      18.5 +/-    1.17  0.070 / 0.130
G11     52.4           29.4                5.6 +/-    1.35       9.9 +/-    1.35  0.040 / 0.060
G13     273.7          38.0                6.2 +/-    1.92       9.4 +/-    1.92  0.040 / 0.060
G15     303.4          14.7               -0.9 +/-    2.74      -2.2 +/-    2.74  0.130 / 0.440
G17     234.5          72.2                8.0 +/-    0.93       8.3 +/-    0.93  0.140 / 0.520
G18     46.1           15.6                4.9 +/-    1.48      12.1 +/-    1.48  0.070 / 0.090
G19     223.8          40.2                5.6 +/-    0.99       8.2 +/-    0.99  0.060 / 0.110
G28     15.2           60.1                6.4 +/-    0.27       7.2 +/-    0.27  0.030 / 0.030
G30     135.8          63.1               10.7 +/-    1.13      11.9 +/-    1.13  0.040 / 0.030