PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/20-08:57:40
G02     215.5          61.7                6.9 +/-    0.96       7.7 +/-    0.96  0.050 / 0.070
G06     58.1           74.0                6.5 +/-    0.47       6.7 +/-    0.47  0.040 / 0.080
G12     318.9          38.9                4.2 +/-    1.58       6.2 +/-    1.58  0.080 / 0.210
G17     56.7           32.2                4.3 +/-    2.11       7.2 +/-    2.11  0.070 / 0.220
G19     40.8           47.6                5.5 +/-    1.16       7.2 +/-    1.16  0.060 / 0.080
G24     267.5          41.0                7.1 +/-    2.30      10.1 +/-    2.30  0.040 / 0.080
G28     119.9          21.5                8.5 +/-    1.01      18.0 +/-    1.01  0.080 / 0.060