PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-21:27:40
G02     203.8          37.6               16.3 +/-    2.62      24.6 +/-    2.62  0.080 / 0.120
G06     160.6          70.2               16.1 +/-    1.12      17.0 +/-    1.12  0.070 / 0.120
G12     307.6          14.9                9.9 +/-    4.77      24.8 +/-    4.77  0.050 / 0.110
G17     38.2           47.2               12.6 +/-    0.74      16.5 +/-    0.74  0.050 / 0.100
G19     7.2            63.6               12.7 +/-    0.60      14.1 +/-    0.60  0.030 / 0.030
G24     294.1          39.6               12.0 +/-    0.95      17.6 +/-    0.95  0.040 / 0.050
G28     102.4          33.6               14.7 +/-    0.98      24.0 +/-    0.98  0.090 / 0.260