PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-04:58:00
G05     49.6           14.1                2.7 +/-    2.14       7.0 +/-    2.14  0.050 / 0.060
G10     237.3          15.0                5.8 +/-    1.50      14.5 +/-    1.50  0.070 / 0.050
G13     72.5           35.4                6.1 +/-    0.97       9.6 +/-    0.97  0.110 / 0.280
G15     118.7          53.7                6.9 +/-    0.58       8.3 +/-    0.58  0.140 / 0.260
G16     315.6          10.9               -0.1 +/-   13.80      -0.2 +/-   13.80  0.050 / 0.120
G20     250.2          38.7                7.6 +/-    1.17      11.2 +/-    1.17  0.050 / 0.100
G21     317.1          49.6                5.4 +/-    1.08       6.9 +/-    1.08  0.170 / 0.210
G26     288.3          19.2                5.0 +/-    0.78      11.3 +/-    0.78  0.210 / 0.190
G29     152.3          65.5                6.2 +/-    0.62       6.8 +/-    0.62  0.030 / 0.040