PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-08:12:40
G08     306.9          20.4                3.5 +/-    1.32       7.6 +/-    1.32  0.040 / 0.050
G10     339.9          61.1                2.9 +/-    0.60       3.3 +/-    0.60  0.040 / 0.040
G14     219.2          34.2                6.0 +/-    1.85       9.7 +/-    1.85  0.030 / 0.030
G20     43.3           59.0                4.9 +/-    0.96       5.6 +/-    0.96  0.020 / 0.020
G21     137.0          52.5                6.1 +/-    0.66       7.5 +/-    0.66  0.150 / 0.170
G24     69.6           29.1                2.6 +/-    1.39       4.6 +/-    1.39  0.120 / 0.140
G27     273.2          36.8                6.9 +/-    2.70      10.6 +/-    2.70  0.140 / 0.080
G32     225.3          49.9                6.6 +/-    2.57       8.4 +/-    2.57  0.120 / 0.090