PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-20:27:50
G10     258.1          32.7               11.1 +/-    0.87      18.4 +/-    0.87  0.180 / 0.320
G13     46.8           24.4                9.2 +/-    0.85      18.1 +/-    0.85  0.200 / 0.330
G15     77.8           58.3               10.0 +/-    0.65      11.5 +/-    0.65  0.040 / 0.050
G16     286.9          14.6                7.8 +/-    1.54      19.5 +/-    1.54  0.040 / 0.050
G20     282.0          55.9               11.2 +/-    0.68      13.2 +/-    0.68  0.120 / 0.400
G21     345.8          66.0                7.9 +/-    0.95       8.6 +/-    0.95  0.120 / 0.330
G26     260.1          12.0               11.1 +/-    1.89      29.6 +/-    1.89  0.070 / 0.230
G27     322.1          10.8               -7.6 +/-   35.62     -20.7 +/-   35.62  0.070 / 0.200
G29     166.7          41.2               12.8 +/-    1.46      18.2 +/-    1.46  0.030 / 0.050