PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-01:57:40
G02     35.5           52.9                8.6 +/-    0.77      10.4 +/-    0.77  0.020 / 0.030
G05     132.5          64.0               10.4 +/-    0.44      11.4 +/-    0.44  0.030 / 0.030
G06     53.6           16.8                5.9 +/-    1.39      14.0 +/-    1.39  0.040 / 0.050
G12     202.1          67.9               11.3 +/-    0.47      12.1 +/-    0.47  0.050 / 0.050
G25     293.0          55.3                9.5 +/-    4.26      11.2 +/-    4.26  0.100 / 0.150
G29     310.8          33.2                7.7 +/-    1.36      12.7 +/-    1.36  0.110 / 0.170