PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-05:27:40
G10     242.9          20.9                7.5 +/-    1.75      16.1 +/-    1.75  0.090 / 0.160
G13     62.9           33.5                4.9 +/-    0.73       8.0 +/-    0.73  0.100 / 0.180
G15     103.8          56.8                5.8 +/-    0.73       6.7 +/-    0.73  0.040 / 0.050
G16     308.8          13.1                5.2 +/-    2.11      13.5 +/-    2.11  0.050 / 0.060
G20     258.4          44.5                5.6 +/-    0.65       7.6 +/-    0.65  0.070 / 0.110
G21     325.5          54.9                4.6 +/-    0.69       5.4 +/-    0.69  0.070 / 0.130
G26     280.4          18.0                5.3 +/-    1.38      12.2 +/-    1.38  0.030 / 0.050
G29     157.4          56.4                6.0 +/-    0.72       7.1 +/-    0.72  0.030 / 0.040