PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-20:57:50
G05     47.3           21.4                9.4 +/-    2.19      19.9 +/-    2.19  0.260 / 0.280
G13     81.6           36.2               11.9 +/-    0.78      18.5 +/-    0.78  0.160 / 0.190
G15     136.8          48.1               14.2 +/-    0.67      18.3 +/-    0.67  0.080 / 0.070
G16     316.6          11.8                6.0 +/-   16.85      16.1 +/-   16.85  0.060 / 0.050
G20     237.6          -1.5               12.3 +/-    1.86      38.7 +/-    1.86  0.190 / 0.470
G21     307.9          43.0               11.3 +/-    1.00      15.6 +/-    1.00  0.240 / 0.470
G25     200.9          14.1               16.5 +/-    3.76      41.9 +/-    3.76  0.460 / 0.460
G26     290.7          21.2               10.7 +/-    1.54      22.9 +/-    1.54  0.330 / 0.670
G29     150.9          79.3               12.7 +/-    0.48      12.9 +/-    0.48  0.080 / 0.100