PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-21:12:30
G06     177.1          33.8               14.3 +/-    1.56      23.2 +/-    1.56  0.080 / 0.110
G13     239.1          24.3               16.2 +/-    1.83      32.1 +/-    1.83  0.080 / 0.120
G15     272.6          13.2               13.6 +/-    1.53      35.2 +/-    1.53  0.400 / 0.230
G17     357.2          72.4               14.0 +/-    0.72      14.6 +/-    0.72  0.140 / 0.210
G19     269.1          68.0               15.1 +/-    1.01      16.1 +/-    1.01  0.120 / 0.310
G24     316.9          17.8               11.7 +/-    3.16      27.2 +/-    3.16  0.120 / 0.270
G28     62.8           51.4               12.2 +/-    1.04      15.1 +/-    1.04  0.040 / 0.030
G30     153.3          28.7               14.5 +/-    1.30      26.1 +/-    1.30  0.030 / 0.040