PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-13:57:50
G10     263.2          36.4                4.0 +/-    1.09       6.2 +/-    1.09  0.040 / 0.050
G13     43.6           20.6                3.8 +/-    0.74       8.1 +/-    0.74  0.040 / 0.040
G15     64.2           52.1                3.5 +/-    0.41       4.3 +/-    0.41  0.110 / 0.360
G16     284.7          13.0                1.2 +/-    2.15       3.2 +/-    2.15  0.090 / 0.340
G20     291.1          58.7                5.1 +/-    1.11       5.8 +/-    1.11  0.070 / 0.220
G21     5.9            71.2                3.4 +/-    0.71       3.5 +/-    0.71  0.070 / 0.240
G24     119.8          12.5                6.3 +/-    1.30      16.5 +/-    1.30  0.060 / 0.080
G27     321.2          13.6                2.3 +/-    3.16       5.8 +/-    3.16  0.060 / 0.080
G29     166.0          33.2                5.8 +/-    1.90       9.5 +/-    1.90  0.100 / 0.190