PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-14:27:40
G02     205.8          37.0               10.2 +/-    2.28      15.6 +/-    2.28  0.080 / 0.090
G06     145.5          74.3               10.1 +/-    0.64      10.4 +/-    0.64  0.070 / 0.080
G12     309.5          19.0                6.6 +/-    0.88      14.8 +/-    0.88  0.100 / 0.200
G17     37.3           48.2                6.5 +/-    0.40       8.4 +/-    0.40  0.130 / 0.210
G19     14.2           61.2                7.5 +/-    0.61       8.4 +/-    0.61  0.050 / 0.140
G24     292.7          39.4                6.5 +/-    0.69       9.6 +/-    0.69  0.050 / 0.120
G28     104.0          33.6                7.7 +/-    0.68      12.6 +/-    0.68  0.030 / 0.040