PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-17:13:00
G02     229.0          68.9                7.8 +/-    0.85       8.3 +/-    0.85  0.310 / 0.460
G05     174.1          11.0               -1.7 +/-   22.72      -4.6 +/-   22.72  0.360 / 0.350
G06     42.9           63.8                5.3 +/-    0.35       5.8 +/-    0.35  0.110 / 0.110
G12     320.5          44.9                7.3 +/-    0.33       9.9 +/-    0.33  0.080 / 0.120
G17     63.9           28.5                5.9 +/-    1.36      10.7 +/-    1.36  0.050 / 0.100
G19     51.9           40.9                6.7 +/-    1.28       9.5 +/-    1.28  0.040 / 0.120
G24     252.4          37.6                9.9 +/-    1.66      15.0 +/-    1.66  0.050 / 0.060
G28     127.8          11.0               10.2 +/-    3.83      27.9 +/-    3.83  0.050 / 0.090