PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/08-07:12:40
G10     267.5          39.4                5.4 +/-    1.15       8.0 +/-    1.15  0.040 / 0.030
G13     41.6           17.4                3.8 +/-    2.67       8.9 +/-    2.67  0.040 / 0.040
G15     58.0           47.5                4.0 +/-    1.00       5.2 +/-    1.00  0.110 / 0.070
G16     283.5          11.7                3.5 +/-    2.05       9.4 +/-    2.05  0.100 / 0.070
G20     298.6          60.5                5.1 +/-    0.68       5.8 +/-    0.68  0.140 / 0.340
G21     11.3           72.7                4.8 +/-    0.63       5.0 +/-    0.63  0.230 / 0.380
G24     119.1          14.5                5.1 +/-    1.68      12.9 +/-    1.68  0.180 / 0.320
G27     319.4          17.5                4.3 +/-    1.72      10.1 +/-    1.72  0.290 / 0.220
G29     165.1          26.5                6.1 +/-    1.36      11.5 +/-    1.36  0.220 / 0.180