PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/20-13:13:10
G02     74.7           19.6                4.6 +/-    1.82      10.2 +/-    1.82  0.030 / 0.040
G05     45.4           47.2                4.4 +/-    0.86       5.7 +/-    0.86  0.040 / 0.040
G12     178.4          12.8                3.9 +/-    2.10      10.2 +/-    2.10  0.250 / 0.280
G13     110.5          26.3                8.6 +/-    2.02      16.4 +/-    2.02  0.230 / 0.350
G15     151.0          28.9                6.0 +/-    1.26      10.8 +/-    1.26  0.030 / 0.020
G20     227.7          15.6                4.3 +/-    5.28      10.7 +/-    5.28  0.030 / 0.030
G21     287.0          28.4                3.6 +/-    1.60       6.5 +/-    1.60  0.100 / 0.150
G25     217.2          37.3                6.8 +/-    1.71      10.3 +/-    1.71  0.150 / 0.260
G26     315.5          12.9                3.2 +/-    3.15       8.3 +/-    3.15  0.080 / 0.190
G29     341.5          71.6                5.1 +/-    0.65       5.3 +/-    0.65  0.090 / 0.180