PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-19:12:50
G01     67.5           32.1               11.4 +/-    0.84      19.2 +/-    0.84  0.040 / 0.060
G07     138.2          22.8               14.5 +/-    1.68      29.9 +/-    1.68  0.040 / 0.060
G11     51.3           28.6                9.4 +/-    1.66      17.0 +/-    1.66  0.070 / 0.140
G13     270.5          38.0               13.8 +/-    0.98      20.7 +/-    0.98  0.070 / 0.160
G15     299.6          16.0                9.1 +/-    1.96      22.1 +/-    1.96  0.130 / 0.370
G17     236.7          71.3               12.8 +/-    0.74      13.4 +/-    0.74  0.130 / 0.450
G18     45.7           15.8               10.0 +/-    1.89      24.4 +/-    1.89  0.040 / 0.090
G19     225.3          44.7               14.1 +/-    0.78      19.1 +/-    0.78  0.050 / 0.080
G28     14.5           60.4               11.7 +/-    1.00      13.2 +/-    1.00  0.050 / 0.120
G30     137.8          57.1               13.3 +/-    0.75      15.5 +/-    0.75  0.060 / 0.100