PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-07:57:50
G08     303.0          21.6                4.2 +/-    1.70       8.9 +/-    1.70  0.050 / 0.060
G10     348.9          62.0                4.9 +/-    0.51       5.4 +/-    0.51  0.050 / 0.060
G14     221.9          38.2                6.9 +/-    1.78      10.4 +/-    1.78  0.080 / 0.080
G20     50.7           57.1                6.0 +/-    0.67       7.0 +/-    0.67  0.080 / 0.100
G21     140.4          48.5                7.7 +/-    0.92       9.9 +/-    0.92  0.030 / 0.030
G24     64.9           28.3                4.2 +/-    0.79       7.5 +/-    0.79  0.030 / 0.030
G27     267.6          35.8                8.4 +/-    1.77      13.1 +/-    1.77  0.090 / 0.130
G32     229.4          54.3                8.2 +/-    1.98       9.9 +/-    1.98  0.080 / 0.140