PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/29-13:57:50
G10     265.2          37.6                5.2 +/-    0.89       7.8 +/-    0.89  0.040 / 0.040
G13     42.7           19.3                3.0 +/-    0.97       6.8 +/-    0.97  0.040 / 0.040
G15     61.8           50.8                4.9 +/-    0.63       6.1 +/-    0.63  0.080 / 0.240
G16     283.0          12.5                3.4 +/-    2.28       8.9 +/-    2.28  0.070 / 0.190
G20     294.4          59.6                3.5 +/-    1.00       4.0 +/-    1.00  0.090 / 0.080
G21     10.9           72.2                3.7 +/-    1.06       3.9 +/-    1.06  0.070 / 0.080
G24     118.3          13.6                7.1 +/-    1.76      18.3 +/-    1.76  0.160 / 0.290
G27     320.6          15.0                1.8 +/-    2.19       4.4 +/-    2.19  0.170 / 0.330
G29     166.3          31.2                6.1 +/-    2.00      10.4 +/-    2.00  0.170 / 0.290