PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/22-16:27:20
G02     204.9          37.0                9.2 +/-    1.04      14.0 +/-    1.04  0.080 / 0.090
G06     150.7          72.9                8.9 +/-    0.70       9.2 +/-    0.70  0.120 / 0.080
G12     308.6          17.1                7.3 +/-    2.68      17.3 +/-    2.68  0.060 / 0.050
G17     36.4           49.0                7.1 +/-    1.34       9.1 +/-    1.34  0.050 / 0.040
G19     11.5           62.2                8.0 +/-    0.69       8.9 +/-    0.69  0.070 / 0.110
G24     293.8          39.2                6.6 +/-    2.28       9.7 +/-    2.28  0.050 / 0.110
G28     103.0          34.0                8.2 +/-    0.66      13.3 +/-    0.66  0.050 / 0.030