PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-21:12:50
G06     177.5          31.8               19.0 +/-    1.99      32.1 +/-    1.99  0.300 / 0.350
G13     240.8          25.5               16.0 +/-    1.19      30.9 +/-    1.19  0.160 / 0.330
G15     274.3          13.8               11.5 +/-    1.12      29.4 +/-    1.12  0.030 / 0.060
G17     352.7          73.8               11.0 +/-    0.62      11.4 +/-    0.62  0.030 / 0.060
G19     264.3          66.9               12.5 +/-    1.00      13.4 +/-    1.00  0.060 / 0.120
G24     317.4          16.3                8.0 +/-    2.10      19.3 +/-    2.10  0.060 / 0.110
G28     60.1           52.2                9.9 +/-    0.71      12.2 +/-    0.71  0.040 / 0.030
G30     152.7          30.6               15.9 +/-    1.50      27.5 +/-    1.50  0.040 / 0.040