PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-06:28:00
G10     265.5          38.2                4.3 +/-    1.57       6.4 +/-    1.57  0.040 / 0.040
G13     42.4           18.8                4.2 +/-    4.20       9.5 +/-    4.20  0.040 / 0.050
G15     59.9           48.8                7.1 +/-    1.07       9.0 +/-    1.07  0.170 / 0.550
G16     284.7          12.2                4.1 +/-    2.20      10.9 +/-    2.20  0.440 / 0.300
G20     295.1          59.7                4.0 +/-    1.22       4.5 +/-    1.22  0.180 / 0.350
G21     5.1            71.5                4.5 +/-    1.22       4.7 +/-    1.22  0.190 / 0.400
G24     120.9          13.4                3.9 +/-    1.82      10.0 +/-    1.82  0.080 / 0.050
G27     320.1          16.1                4.8 +/-    2.53      11.6 +/-    2.53  0.100 / 0.070
G29     165.0          28.9                5.8 +/-    0.94      10.4 +/-    0.94  0.220 / 0.250