PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/21-14:57:50
G10     249.5          27.8                8.4 +/-    2.44      15.5 +/-    2.44  0.280 / 0.670
G13     54.0           29.2                7.9 +/-    2.01      14.1 +/-    2.01  0.250 / 0.630
G15     84.1           56.2                8.4 +/-    0.86       9.8 +/-    0.86  0.040 / 0.040
G16     296.2          16.1                5.3 +/-    5.99      12.8 +/-    5.99  0.030 / 0.040
G20     270.9          52.5                9.0 +/-    2.76      11.0 +/-    2.76  0.050 / 0.060
G21     333.5          59.3                5.9 +/-    0.64       6.8 +/-    0.64  0.040 / 0.040
G26     269.7          15.9                7.5 +/-    5.25      18.1 +/-    5.25  0.110 / 0.100
G29     163.4          52.8                9.7 +/-    0.99      11.9 +/-    0.99  0.080 / 0.160