PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-06:57:50
G08     317.8          13.8                4.3 +/-    3.12      11.0 +/-    3.12  0.060 / 0.040
G10     314.5          56.9                5.2 +/-    1.40       6.1 +/-    1.40  0.060 / 0.040
G14     212.8          21.4                6.9 +/-    1.55      14.7 +/-    1.55  0.040 / 0.050
G15     45.6           18.2                2.9 +/-    2.22       6.7 +/-    2.22  0.040 / 0.040
G20     16.1           63.7                6.1 +/-    0.75       6.7 +/-    0.75  0.070 / 0.070
G21     120.8          65.4                7.4 +/-    1.05       8.1 +/-    1.05  0.050 / 0.070
G24     85.6           29.1                7.5 +/-    0.79      13.4 +/-    0.79  0.180 / 0.210
G27     290.6          36.7                6.0 +/-    1.94       9.3 +/-    1.94  0.170 / 0.170
G32     215.8          37.3                8.8 +/-    0.88      13.4 +/-    0.88  0.090 / 0.100