PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-12:27:50
G01     250.4          35.9                5.5 +/-    0.79       8.6 +/-    0.79  0.190 / 0.210
G11     236.5          11.5                3.0 +/-    2.26       8.2 +/-    2.26  0.130 / 0.280
G14     60.3           40.4                3.9 +/-    1.02       5.6 +/-    1.02  0.060 / 0.100
G16     165.6          15.8               -4.8 +/-   14.28     -11.7 +/-   14.28  0.060 / 0.090
G18     218.6          26.8                5.6 +/-    1.21      10.6 +/-    1.21  0.060 / 0.040
G22     300.9          71.0                3.6 +/-    0.98       3.8 +/-    0.98  0.060 / 0.040
G23     286.6          19.5                4.5 +/-    1.69       9.9 +/-    1.69  0.110 / 0.460
G26     139.8          36.9                6.4 +/-    0.41       9.8 +/-    0.41  0.100 / 0.410
G31     41.5           59.5                3.2 +/-    0.59       3.7 +/-    0.59  0.050 / 0.090
G32     74.5           27.2                3.1 +/-    0.67       5.8 +/-    0.67  0.050 / 0.090