PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-18:58:00
G07     108.5          53.2               12.9 +/-    0.46      15.6 +/-    0.46  0.050 / 0.060
G08     41.9           21.1                9.6 +/-    0.74      20.5 +/-    0.74  0.040 / 0.070
G09     175.8          16.4               16.6 +/-    2.34      40.0 +/-    2.34  0.030 / 0.050
G11     89.4           43.0               13.4 +/-    0.54      18.6 +/-    0.54  0.030 / 0.050
G13     310.4          28.4               10.1 +/-    1.10      18.2 +/-    1.10  0.030 / 0.030
G17     204.3          36.6               14.8 +/-    2.13      22.8 +/-    2.13  0.030 / 0.030
G18     79.8           23.5               10.8 +/-    0.98      21.8 +/-    0.98  0.120 / 0.350
G19     208.1          11.9               -1.8 +/-   18.41      -4.8 +/-   18.41  0.060 / 0.160
G28     306.0          58.7               11.5 +/-    0.49      13.2 +/-    0.49  0.060 / 0.160
G30     25.0           77.8               12.1 +/-    0.82      12.3 +/-    0.82  0.070 / 0.240