PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-13:28:00
G08     271.7          20.7                4.1 +/-    2.77       9.0 +/-    2.77  0.110 / 0.190
G10     50.7           59.9                4.3 +/-    0.63       4.8 +/-    0.63  0.120 / 0.210
G14     254.9          63.3                6.4 +/-    0.48       7.1 +/-    0.48  0.040 / 0.040
G18     314.1          30.0                4.4 +/-    1.21       7.8 +/-    1.21  0.050 / 0.040
G20     89.3           40.4                4.3 +/-    0.74       6.2 +/-    0.74  0.020 / 0.020
G21     152.5          17.0                4.9 +/-    1.02      11.6 +/-    1.02  0.030 / 0.030
G24     41.2           12.2                3.5 +/-    2.24       9.2 +/-    2.24  0.040 / 0.020
G27     238.9          20.6                5.3 +/-    1.60      11.4 +/-    1.60  0.040 / 0.020
G31     181.7          21.4                4.5 +/-    2.42       9.5 +/-    2.42  0.070 / 0.120
G32     300.2          75.1                5.9 +/-    0.49       6.0 +/-    0.49  0.090 / 0.140