PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-21:27:40
G10     266.8          38.3                9.8 +/-    1.34      14.7 +/-    1.34  0.120 / 0.150
G13     41.9           18.3                9.2 +/-    3.14      21.1 +/-    3.14  0.150 / 0.150
G16     278.5          12.3               11.0 +/-    1.91      29.1 +/-    1.91  0.150 / 0.420
G20     297.0          60.2                8.6 +/-    1.17       9.8 +/-    1.17  0.200 / 0.490
G21     2.0            71.6                9.5 +/-    0.61       9.9 +/-    0.61  0.110 / 0.320
G24     118.3          14.3               12.0 +/-    1.94      30.2 +/-    1.94  0.170 / 0.350
G27     319.2          17.8                9.2 +/-    1.47      21.2 +/-    1.47  0.100 / 0.060
G29     168.1          32.0               11.2 +/-    1.45      18.8 +/-    1.45  0.090 / 0.050