PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-03:12:30
G08     299.3          22.3               10.2 +/-    1.77      21.3 +/-    1.77  0.070 / 0.130
G10     354.6          62.5                8.2 +/-    0.53       9.2 +/-    0.53  0.060 / 0.110
G14     225.0          38.7               16.1 +/-    2.74      24.0 +/-    2.74  0.060 / 0.120
G20     25.0           64.8                9.3 +/-    0.50      10.2 +/-    0.50  0.060 / 0.110
G21     143.3          47.3               10.5 +/-    1.07      13.7 +/-    1.07  0.040 / 0.080
G24     60.7           27.1                7.1 +/-    0.73      13.3 +/-    0.73  0.060 / 0.090
G27     261.2          34.4               13.1 +/-    1.16      21.1 +/-    1.16  0.030 / 0.030
G32     236.5          64.7               12.9 +/-    0.78      14.1 +/-    0.78  0.040 / 0.040