PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/31-19:57:30
G02     204.0          37.2               11.5 +/-    1.87      17.5 +/-    1.87  0.050 / 0.140
G06     158.1          70.8               10.6 +/-    1.21      11.1 +/-    1.21  0.050 / 0.140
G12     307.7          15.1                7.2 +/-    2.67      17.9 +/-    2.67  0.080 / 0.090
G17     37.4           47.9                9.7 +/-    0.32      12.5 +/-    0.32  0.100 / 0.090
G19     7.9            63.4                9.1 +/-    0.54      10.1 +/-    0.54  0.250 / 0.370
G24     294.5          39.3                9.2 +/-    0.95      13.6 +/-    0.95  0.140 / 0.380
G28     102.2          34.0                9.8 +/-    0.84      15.9 +/-    0.84  0.050 / 0.120