PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-23:42:50
G02     251.0          78.3                8.5 +/-    0.69       8.7 +/-    0.69  0.170 / 0.310
G05     170.0          18.6               12.6 +/-    2.77      28.8 +/-    2.77  0.130 / 0.310
G06     39.4           59.0                9.2 +/-    0.45      10.5 +/-    0.45  0.090 / 0.110
G12     320.8          51.2                7.8 +/-    1.30       9.7 +/-    1.30  0.080 / 0.120
G17     72.5           20.5                8.8 +/-    1.18      19.2 +/-    1.18  0.050 / 0.050
G19     59.1           36.9                9.6 +/-    1.01      14.7 +/-    1.01  0.040 / 0.050
G24     241.8          33.3               11.5 +/-    2.33      18.8 +/-    2.33  0.100 / 0.150
G25     316.7          14.5                5.6 +/-    2.78      14.0 +/-    2.78  0.110 / 0.160