PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-18:42:50
G01     119.4          17.0               14.0 +/-    1.30      33.1 +/-    1.30  0.030 / 0.040
G07     88.0           61.8               12.6 +/-    0.81      14.1 +/-    0.81  0.030 / 0.040
G08     45.1           31.7               10.3 +/-    1.20      17.5 +/-    1.20  0.030 / 0.030
G09     177.8          28.3               13.7 +/-    1.12      24.8 +/-    1.12  0.030 / 0.030
G11     106.3          40.2               13.3 +/-    0.97      19.3 +/-    0.97  0.090 / 0.090
G13     317.8          19.5               10.9 +/-    1.17      24.4 +/-    1.17  0.080 / 0.070
G17     200.7          24.0               14.0 +/-    2.67      28.0 +/-    2.67  0.090 / 0.210
G18     92.9           20.3               12.0 +/-    1.57      26.3 +/-    1.57  0.100 / 0.240
G28     284.5          54.0               13.5 +/-    2.89      16.3 +/-    2.89  0.120 / 0.320
G30     348.4          69.2               12.4 +/-    0.70      13.2 +/-    0.70  0.090 / 0.330