PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-23:42:40
G02     227.1          70.3               16.3 +/-    0.79      17.2 +/-    0.79  0.050 / 0.090
G05     173.7          10.7               -1.0 +/-   36.89      -2.7 +/-   36.89  0.060 / 0.070
G06     44.3           68.8               13.1 +/-    0.79      14.0 +/-    0.79  0.040 / 0.050
G12     319.9          42.0               12.8 +/-    0.37      18.0 +/-    0.37  0.050 / 0.050
G17     65.0           25.9               12.2 +/-    1.34      23.4 +/-    1.34  0.320 / 0.370
G19     49.6           42.8               13.7 +/-    1.27      19.0 +/-    1.27  0.320 / 0.440
G24     251.9          38.3               17.6 +/-    1.74      26.4 +/-    1.74  0.030 / 0.030
G28     127.3          10.5               18.3 +/-    3.89      50.6 +/-    3.89  0.030 / 0.030