PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-21:13:00
G06     177.5          31.8               18.5 +/-    2.15      31.3 +/-    2.15  0.040 / 0.070
G13     240.8          25.5               17.9 +/-    1.19      34.5 +/-    1.19  0.040 / 0.070
G15     274.3          13.8               13.2 +/-    0.94      33.8 +/-    0.94  0.150 / 0.390
G17     352.7          73.8               12.3 +/-    0.95      12.8 +/-    0.95  0.160 / 0.280
G19     264.3          66.9               12.7 +/-    0.49      13.6 +/-    0.49  0.060 / 0.130
G24     317.4          16.3                8.7 +/-    3.08      21.0 +/-    3.08  0.070 / 0.110
G28     60.1           52.2               11.6 +/-    0.66      14.2 +/-    0.66  0.050 / 0.040
G30     152.7          30.6               18.3 +/-    0.77      31.6 +/-    0.77  0.040 / 0.040