PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-14:57:40
G10     266.4          38.3                5.6 +/-    0.68       8.4 +/-    0.68  0.030 / 0.040
G13     42.1           18.4                4.0 +/-    2.63       9.2 +/-    2.63  0.040 / 0.040
G15     60.8           50.4                5.1 +/-    0.76       6.4 +/-    0.76  0.110 / 0.070
G16     281.3          12.2                5.4 +/-    3.43      14.4 +/-    3.43  0.080 / 0.070
G20     296.6          60.1                5.1 +/-    0.85       5.8 +/-    0.85  0.170 / 0.250
G21     11.8           72.6                5.2 +/-    0.62       5.4 +/-    0.62  0.150 / 0.270
G24     116.8          14.3                8.1 +/-    1.56      20.4 +/-    1.56  0.390 / 0.260
G27     320.0          16.2                4.0 +/-    2.96       9.8 +/-    2.96  0.220 / 0.190
G29     166.7          30.4                5.7 +/-    0.97       9.9 +/-    0.97  0.290 / 0.190