PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-21:27:40
G02     23.4           62.5                9.4 +/-    0.62      10.5 +/-    0.62  0.060 / 0.030
G05     149.9          54.3               10.5 +/-    0.92      12.7 +/-    0.92  0.050 / 0.020
G06     48.7           23.1                7.4 +/-    0.51      15.2 +/-    0.51  0.030 / 0.070
G12     229.0          77.5                8.5 +/-    0.84       8.7 +/-    0.84  0.040 / 0.060
G19     92.9           13.9                9.9 +/-    1.85      25.2 +/-    1.85  0.030 / 0.010
G25     307.6          46.4                9.5 +/-    1.10      12.6 +/-    1.10  0.040 / 0.010
G29     301.5          23.1                9.8 +/-    1.34      20.1 +/-    1.34  0.110 / 0.210