PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-08:12:30
G08     305.3          21.0                4.0 +/-    1.03       8.6 +/-    1.03  0.040 / 0.030
G10     343.7          61.5                3.4 +/-    0.45       3.8 +/-    0.45  0.030 / 0.040
G14     220.3          35.9                7.7 +/-    1.51      12.1 +/-    1.51  0.040 / 0.070
G20     46.5           58.2                4.6 +/-    0.48       5.3 +/-    0.48  0.040 / 0.070
G21     138.5          50.7                5.7 +/-    0.87       7.1 +/-    0.87  0.070 / 0.090
G24     67.5           28.8                3.3 +/-    0.73       5.9 +/-    0.73  0.090 / 0.070
G27     270.8          36.4                7.1 +/-    1.22      11.0 +/-    1.22  0.090 / 0.130
G32     226.9          51.7                7.7 +/-    0.95       9.5 +/-    0.95  0.060 / 0.140