PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-07:58:00
G08     312.7          17.6                3.9 +/-    1.36       9.2 +/-    1.36  0.040 / 0.040
G10     326.6          59.3                4.1 +/-    1.10       4.7 +/-    1.10  0.040 / 0.030
G14     215.6          27.8                5.5 +/-    3.19      10.0 +/-    3.19  0.040 / 0.040
G15     46.3           12.5                1.6 +/-    1.62       4.3 +/-    1.62  0.030 / 0.050
G20     30.4           61.7                3.0 +/-    0.66       3.3 +/-    0.66  0.070 / 0.070
G21     130.2          58.9                4.7 +/-    0.54       5.4 +/-    0.54  0.060 / 0.090
G24     77.4           29.6                3.5 +/-    1.13       6.2 +/-    1.13  0.080 / 0.080
G27     282.0          37.4                5.8 +/-    0.91       8.8 +/-    0.91  0.090 / 0.100
G32     220.0          43.4                7.4 +/-    0.83      10.1 +/-    0.83  0.100 / 0.180