PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-22:27:40
G02     199.9          20.4               18.4 +/-    2.74      40.1 +/-    2.74  0.100 / 0.160
G06     174.2          50.2               16.3 +/-    1.13      20.5 +/-    1.13  0.080 / 0.150
G13     227.0          13.9               16.3 +/-    7.16      41.6 +/-    7.16  0.260 / 0.740
G17     22.1           59.8               11.3 +/-    0.88      12.8 +/-    0.88  0.230 / 0.800
G19     319.7          71.4               10.2 +/-    0.68      10.7 +/-    0.68  0.040 / 0.030
G24     309.7          30.0               10.0 +/-    1.74      17.5 +/-    1.74  0.040 / 0.030
G28     83.6           43.7               11.5 +/-    1.20      15.7 +/-    1.20  0.040 / 0.080
G30     156.5          14.2               16.4 +/-    1.65      41.6 +/-    1.65  0.050 / 0.080