PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-14:28:00
G10     256.6          31.9                5.2 +/-    2.03       8.7 +/-    2.03  0.050 / 0.040
G13     47.9           25.4                4.5 +/-    2.17       8.7 +/-    2.17  0.050 / 0.040
G15     75.2           56.1                5.9 +/-    0.86       7.0 +/-    0.86  0.100 / 0.170
G16     290.8          14.4                2.0 +/-    1.69       5.0 +/-    1.69  0.210 / 0.140
G20     279.7          55.0                6.2 +/-    2.66       7.4 +/-    2.66  0.110 / 0.090
G21     350.0          66.8                4.5 +/-    0.33       4.8 +/-    0.33  0.080 / 0.090
G26     264.6          12.6                3.5 +/-    0.89       9.1 +/-    0.89  0.040 / 0.040
G29     165.0          40.9                6.1 +/-    0.91       8.7 +/-    0.91  0.030 / 0.040