PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/11-14:12:50
G10     265.6          39.0                6.6 +/-    1.32       9.7 +/-    1.32  0.090 / 0.140
G13     42.3           18.3                4.2 +/-    1.94       9.6 +/-    1.94  0.080 / 0.170
G15     58.3           46.9                5.4 +/-    0.56       7.2 +/-    0.56  0.080 / 0.350
G16     280.0          13.3                3.6 +/-    1.45       9.2 +/-    1.45  0.090 / 0.350
G20     300.1          61.7                5.7 +/-    0.53       6.4 +/-    0.53  0.120 / 0.290
G21     2.1            70.8                4.5 +/-    0.75       4.7 +/-    0.75  0.110 / 0.360
G24     123.7          13.0                7.3 +/-    2.59      19.1 +/-    2.59  0.040 / 0.040
G27     319.5          17.4                2.8 +/-    1.55       6.5 +/-    1.55  0.040 / 0.040
G29     167.1          34.4                8.3 +/-    0.73      13.3 +/-    0.73  0.040 / 0.080