PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-12:12:30
G02     204.2          34.4                5.2 +/-    1.05       8.3 +/-    1.05  0.080 / 0.100
G06     153.3          71.0                5.3 +/-    0.49       5.6 +/-    0.49  0.100 / 0.090
G12     307.9          17.2                4.0 +/-    3.45       9.4 +/-    3.45  0.030 / 0.050
G17     35.3           49.7                3.0 +/-    0.90       3.8 +/-    0.90  0.050 / 0.040
G19     8.2            63.5                3.5 +/-    0.44       3.8 +/-    0.44  0.050 / 0.030
G24     297.2          37.6                1.9 +/-    4.22       2.9 +/-    4.22  0.060 / 0.040
G28     100.0          36.6                4.7 +/-    0.99       7.3 +/-    0.99  0.040 / 0.030