PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-05:27:50
G05     48.5           16.6                1.4 +/-    1.62       3.2 +/-    1.62  0.050 / 0.050
G10     235.3          12.7                4.5 +/-   12.10      11.9 +/-   12.10  0.050 / 0.070
G13     76.4           35.7                6.2 +/-    1.21       9.8 +/-    1.21  0.120 / 0.220
G15     123.8          51.9                6.7 +/-    0.82       8.2 +/-    0.82  0.170 / 0.480
G20     247.4          36.4                8.1 +/-    2.05      12.5 +/-    2.05  0.060 / 0.100
G21     314.4          47.9                4.3 +/-    0.98       5.6 +/-    0.98  0.060 / 0.100
G25     199.0          11.6                3.5 +/-    2.81       9.5 +/-    2.81  0.130 / 0.290
G26     291.7          19.2                4.2 +/-    1.62       9.5 +/-    1.62  0.180 / 0.270
G29     149.3          68.5                6.3 +/-    0.52       6.7 +/-    0.52  0.030 / 0.030