PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-23:12:30
G10     274.1          42.2               11.9 +/-    1.30      16.7 +/-    1.30  0.090 / 0.140
G13     39.3           13.2                8.5 +/-    2.39      22.0 +/-    2.39  0.130 / 0.130
G15     55.4           47.2               10.4 +/-    0.63      13.7 +/-    0.63  0.040 / 0.050
G20     274.0          34.1                6.7 +/-    0.70      10.7 +/-    0.70  0.050 / 0.040
G21     17.1           75.1               11.0 +/-    0.95      11.4 +/-    0.95  0.120 / 0.240
G24     113.2          18.0               12.0 +/-    1.75      27.8 +/-    1.75  0.090 / 0.210
G27     315.5          23.4               10.0 +/-    1.43      20.3 +/-    1.43  0.230 / 0.370
G29     168.9          25.8               12.7 +/-    2.28      24.3 +/-    2.28  0.080 / 0.260
G32     204.8          16.6               16.3 +/-    2.26      39.0 +/-    2.26  0.040 / 0.050