PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-17:57:40
G01     319.8          16.2                6.1 +/-    1.52      14.8 +/-    1.52  0.120 / 0.380
G08     257.3          14.4                8.5 +/-    1.83      21.5 +/-    1.83  0.130 / 0.250
G10     76.7           53.7                8.1 +/-    0.95       9.8 +/-    0.95  0.060 / 0.050
G11     304.0          22.9                6.2 +/-    0.92      12.8 +/-    0.92  0.050 / 0.060
G14     291.5          70.7                2.2 +/-    0.58       2.3 +/-    0.58  0.040 / 0.040
G18     304.5          41.8                8.1 +/-    1.11      11.5 +/-    1.11  0.040 / 0.040
G20     103.5          30.5                9.8 +/-    0.67      17.0 +/-    0.67  0.110 / 0.200
G27     227.9          10.9                7.9 +/-    3.64      21.5 +/-    3.64  0.070 / 0.230
G31     179.9          35.9               11.9 +/-    2.37      18.5 +/-    2.37  0.160 / 0.320
G32     359.7          69.7                8.5 +/-    0.63       9.0 +/-    0.63  0.170 / 0.280