PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-04:27:50
G10     256.7          31.3                9.9 +/-    2.09      16.8 +/-    2.09  0.130 / 0.400
G13     48.0           25.8                6.8 +/-    0.99      13.1 +/-    0.99  0.120 / 0.340
G15     73.7           55.4                6.1 +/-    0.70       7.2 +/-    0.70  0.040 / 0.040
G16     288.0          14.8                6.5 +/-    1.72      16.2 +/-    1.72  0.040 / 0.050
G20     303.0          66.5                6.5 +/-    0.82       7.0 +/-    0.82  0.140 / 0.320
G21     342.2          64.7                5.5 +/-    1.00       6.0 +/-    1.00  0.150 / 0.330
G26     260.1          12.6                7.0 +/-   16.08      18.4 +/-   16.08  0.080 / 0.120
G27     322.0          10.9               -7.6 +/-   32.55     -20.7 +/-   32.55  0.060 / 0.090
G29     166.8          42.9                7.7 +/-    1.11      10.7 +/-    1.11  0.070 / 0.190