PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-14:57:30
G10     296.8          51.9                5.5 +/-    0.83       6.8 +/-    0.83  0.030 / 0.050
G14     209.7          11.6                0.3 +/-   21.63       0.8 +/-   21.63  0.030 / 0.040
G15     46.4           29.6                2.4 +/-    0.57       4.3 +/-    0.57  0.090 / 0.140
G20     350.9          65.4                3.2 +/-    0.90       3.5 +/-    0.90  0.100 / 0.140
G21     100.7          71.0                4.5 +/-    0.76       4.8 +/-    0.76  0.350 / 0.550
G24     94.1           25.7                9.3 +/-    0.49      17.9 +/-    0.49  0.150 / 0.370
G27     303.8          32.0                4.7 +/-    1.15       8.0 +/-    1.15  0.050 / 0.030
G32     210.4          29.9                7.4 +/-    0.67      13.1 +/-    0.67  0.040 / 0.050