PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/27-16:57:40
G02     218.3          60.4                8.7 +/-    1.28       9.8 +/-    1.28  0.130 / 0.240
G06     53.2           72.3                7.7 +/-    0.41       8.0 +/-    0.41  0.100 / 0.240
G12     318.4          36.6                9.5 +/-    1.37      14.6 +/-    1.37  0.060 / 0.090
G17     56.5           33.8                6.9 +/-    1.67      11.2 +/-    1.67  0.090 / 0.090
G19     42.7           46.6                8.6 +/-    1.63      11.3 +/-    1.63  0.040 / 0.080
G24     263.4          40.7                9.7 +/-    3.68      13.9 +/-    3.68  0.060 / 0.110
G28     122.2          17.7                8.1 +/-    2.08      18.9 +/-    2.08  0.040 / 0.050