PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-15:57:30
G02     43.5           46.1                6.8 +/-    0.49       9.0 +/-    0.49  0.030 / 0.030
G05     110.8          70.1                8.6 +/-    0.75       9.1 +/-    0.75  0.030 / 0.030
G12     187.4          52.2                8.5 +/-    1.75      10.4 +/-    1.75  0.040 / 0.050
G25     273.1          58.0                8.4 +/-    0.59       9.7 +/-    0.59  0.050 / 0.060
G29     316.2          37.9                6.6 +/-    0.79      10.0 +/-    0.79  0.040 / 0.060