PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-06:43:00
G10     297.6          52.4                6.4 +/-    1.57       7.8 +/-    1.57  0.050 / 0.040
G14     209.6          11.7                1.7 +/-   17.93       4.6 +/-   17.93  0.040 / 0.040
G15     46.0           27.3                2.7 +/-    1.53       5.0 +/-    1.53  0.260 / 0.370
G20     351.7          65.3                3.8 +/-    0.83       4.1 +/-    0.83  0.100 / 0.450
G21     97.1           73.1                5.6 +/-    0.76       5.8 +/-    0.76  0.070 / 0.090
G24     97.3           26.2                7.1 +/-    0.98      13.5 +/-    0.98  0.060 / 0.100
G27     302.6          33.1                6.2 +/-    0.80      10.2 +/-    0.80  0.030 / 0.030
G32     210.9          27.1                7.3 +/-    1.61      13.7 +/-    1.61  0.050 / 0.040