PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-05:13:10
G01     45.4           21.7                2.5 +/-    0.93       5.3 +/-    0.93  0.150 / 0.370
G06     177.7          29.4                9.7 +/-    1.91      17.2 +/-    1.91  0.160 / 0.300
G13     243.8          27.2                6.9 +/-    2.68      12.8 +/-    2.68  0.110 / 0.190
G15     279.0          14.2                2.9 +/-    1.62       7.3 +/-    1.62  0.090 / 0.240
G17     352.1          74.7                6.4 +/-    0.32       6.6 +/-    0.32  0.040 / 0.080
G19     255.5          62.7                6.3 +/-    0.82       7.0 +/-    0.82  0.040 / 0.060
G24     317.3          16.6                2.7 +/-    4.48       6.6 +/-    4.48  0.070 / 0.110
G28     58.4           52.0                6.0 +/-    0.57       7.4 +/-    0.57  0.070 / 0.150
G30     152.6          36.4               10.4 +/-    0.68      16.1 +/-    0.68  0.060 / 0.080