PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/25-13:57:30
G10     257.7          32.8                6.1 +/-    1.20      10.0 +/-    1.20  0.040 / 0.060
G13     47.0           24.5                3.1 +/-    0.80       6.1 +/-    0.80  0.040 / 0.050
G15     72.7           55.4                3.3 +/-    0.40       3.9 +/-    0.40  0.060 / 0.190
G16     289.9          14.2                3.1 +/-    1.57       7.8 +/-    1.57  0.060 / 0.180
G20     281.7          55.8                6.3 +/-    0.85       7.4 +/-    0.85  0.080 / 0.090
G21     353.3          67.9                1.5 +/-    0.58       1.7 +/-    0.58  0.080 / 0.100
G26     263.9          12.1                4.5 +/-    2.13      11.9 +/-    2.13  0.050 / 0.040
G29     165.1          39.3                6.5 +/-    1.40       9.5 +/-    1.40  0.030 / 0.030