PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/30-12:43:00
G05     49.7           15.2                1.2 +/-    1.53       3.0 +/-    1.53  0.120 / 0.220
G10     238.0          15.3                3.8 +/-    1.32       9.5 +/-    1.32  0.280 / 0.240
G13     71.5           35.6                5.0 +/-    1.23       7.9 +/-    1.23  0.040 / 0.050
G15     120.7          54.1                7.0 +/-    0.36       8.5 +/-    0.36  0.040 / 0.050
G16     313.4          12.2                2.1 +/-    4.72       5.6 +/-    4.72  0.190 / 0.270
G20     251.0          39.4                4.5 +/-    1.37       6.7 +/-    1.37  0.190 / 0.300
G21     320.2          52.1                2.4 +/-    0.69       3.0 +/-    0.69  0.090 / 0.160
G26     287.8          19.0                3.3 +/-    1.76       7.4 +/-    1.76  0.140 / 0.150
G29     155.0          66.7                6.1 +/-    0.76       6.5 +/-    0.76  0.050 / 0.070