PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-21:57:30
G10     252.9          28.7               12.1 +/-    2.61      21.7 +/-    2.61  0.040 / 0.040
G13     51.1           28.2                8.1 +/-    1.66      14.8 +/-    1.66  0.050 / 0.040
G15     87.4           59.2               10.9 +/-    1.28      12.5 +/-    1.28  0.120 / 0.250
G16     291.2          15.9                8.3 +/-    1.43      20.3 +/-    1.43  0.100 / 0.300
G20     254.8          17.0               13.2 +/-    3.12      31.2 +/-    3.12  0.130 / 0.200
G21     335.4          61.2               10.0 +/-    0.47      11.3 +/-    0.47  0.150 / 0.220
G26     263.7          14.6               10.8 +/-    1.23      27.1 +/-    1.23  0.030 / 0.030
G29     165.9          48.3               11.3 +/-    0.80      14.5 +/-    0.80  0.030 / 0.040