PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-13:27:40
G10     249.5          27.9                6.7 +/-    1.94      12.2 +/-    1.94  0.160 / 0.730
G13     54.0           29.2                3.9 +/-    1.05       7.0 +/-    1.05  0.150 / 0.650
G15     82.7           55.7                6.5 +/-    0.58       7.7 +/-    0.58  0.040 / 0.060
G16     296.3          16.0                4.2 +/-    2.85      10.3 +/-    2.85  0.040 / 0.050
G20     271.5          53.1                7.2 +/-    0.99       8.7 +/-    0.99  0.040 / 0.050
G21     334.6          59.8                4.0 +/-    0.70       4.5 +/-    0.70  0.030 / 0.060
G26     270.0          15.8                2.8 +/-   13.31       6.8 +/-   13.31  0.080 / 0.140
G29     163.3          52.7                7.4 +/-    1.66       9.0 +/-    1.66  0.080 / 0.120