PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/15-13:42:40
G10     263.0          35.2                5.2 +/-    0.66       8.2 +/-    0.66  0.180 / 0.180
G13     44.2           22.0                1.7 +/-    1.48       3.7 +/-    1.48  0.170 / 0.190
G15     62.0           49.9                3.5 +/-    0.54       4.4 +/-    0.54  0.070 / 0.060
G16     285.3          12.5                3.0 +/-    1.22       7.8 +/-    1.22  0.070 / 0.070
G18     297.7          64.7                3.9 +/-    0.72       4.3 +/-    0.72  0.040 / 0.040
G20     49.6           41.4                2.3 +/-    0.77       3.3 +/-    0.77  0.040 / 0.040
G21     5.0            71.3                3.1 +/-    0.25       3.3 +/-    0.25  0.240 / 0.340
G24     124.2          11.8                4.0 +/-    7.87      10.8 +/-    7.87  0.190 / 0.360
G27     319.6          17.0                3.1 +/-    2.09       7.4 +/-    2.09  0.230 / 0.370
G29     166.3          32.3                3.9 +/-    0.87       6.6 +/-    0.87  0.190 / 0.490