PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-06:27:40
G10     263.6          37.1                8.5 +/-    1.29      13.0 +/-    1.29  0.040 / 0.040
G13     43.4           20.2                3.7 +/-    2.18       8.1 +/-    2.18  0.040 / 0.040
G15     62.0           50.1                4.9 +/-    1.01       6.1 +/-    1.01  0.170 / 0.330
G16     286.5          12.7                5.9 +/-    1.76      15.4 +/-    1.76  0.260 / 0.430
G20     291.7          58.8                6.0 +/-    1.01       6.9 +/-    1.01  0.060 / 0.100
G21     0.8            70.4                5.0 +/-    0.72       5.3 +/-    0.72  0.060 / 0.160
G24     122.4          12.3                5.3 +/-    2.23      14.1 +/-    2.23  0.140 / 0.210
G27     320.8          14.7                3.6 +/-    2.94       8.9 +/-    2.94  0.180 / 0.300
G29     164.7          30.8                5.2 +/-    1.76       9.0 +/-    1.76  0.110 / 0.220