PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-08:43:10
G08     293.1          23.3                4.9 +/-    0.79      10.0 +/-    0.79  0.050 / 0.080
G10     10.0           62.8                1.9 +/-    0.96       2.1 +/-    0.96  0.050 / 0.090
G14     229.4          47.2                7.0 +/-    2.96       9.1 +/-    2.96  0.030 / 0.020
G18     317.7          11.6               -5.5 +/-   18.03     -14.7 +/-   18.03  0.030 / 0.020
G20     65.6           52.1                4.2 +/-    1.25       5.2 +/-    1.25  0.090 / 0.120
G21     146.4          38.7                6.0 +/-    0.88       8.9 +/-    0.88  0.130 / 0.160
G24     55.2           24.7                2.6 +/-    3.38       5.1 +/-    3.38  0.040 / 0.030
G27     256.2          32.0                5.6 +/-    2.48       9.3 +/-    2.48  0.030 / 0.020
G32     241.9          62.7                6.0 +/-    0.99       6.6 +/-    0.99  0.070 / 0.110