PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-23:42:50
G02     224.2          68.5                8.7 +/-    1.07       9.3 +/-    1.07  0.080 / 0.470
G06     46.3           70.7                8.7 +/-    0.41       9.2 +/-    0.41  0.100 / 0.440
G12     319.5          40.2                8.7 +/-    1.25      12.6 +/-    1.25  0.080 / 0.100
G17     63.5           27.0                8.2 +/-    0.65      15.3 +/-    0.65  0.080 / 0.090
G19     47.6           44.0                9.2 +/-    0.73      12.6 +/-    0.73  0.040 / 0.070
G24     254.1          39.1               10.0 +/-    1.11      14.7 +/-    1.11  0.050 / 0.070
G28     126.2          11.9               11.2 +/-    1.81      30.0 +/-    1.81  0.030 / 0.030