PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-05:12:40
G01     38.7           12.9                0.9 +/-    5.10       2.3 +/-    5.10  0.070 / 0.110
G02     198.3          11.6                0.5 +/-    8.74       1.4 +/-    8.74  0.090 / 0.130
G06     173.5          40.8                6.7 +/-    0.96       9.6 +/-    0.96  0.130 / 0.330
G13     234.4          21.4                5.4 +/-    1.18      11.5 +/-    1.18  0.170 / 0.360
G15     265.8          11.7                4.9 +/-    2.72      13.3 +/-    2.72  0.230 / 0.590
G17     8.0            68.6                5.1 +/-    0.58       5.4 +/-    0.58  0.150 / 0.390
G19     287.5          71.8                4.7 +/-    0.70       4.9 +/-    0.70  0.040 / 0.050
G24     316.1          19.4                0.1 +/-    2.12       0.3 +/-    2.12  0.040 / 0.060
G28     64.3           52.7                5.1 +/-    1.29       6.3 +/-    1.29  0.040 / 0.030
G30     156.5          29.7                7.8 +/-    1.41      13.8 +/-    1.41  0.030 / 0.030