PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-15:58:10
G02     211.8          50.0               11.7 +/-    1.12      14.8 +/-    1.12  0.060 / 0.080
G06     77.6           77.2                9.3 +/-    0.44       9.5 +/-    0.44  0.080 / 0.100
G12     317.5          34.4                7.9 +/-    1.28      12.7 +/-    1.28  0.080 / 0.080
G17     52.5           35.5                6.7 +/-    0.57      10.5 +/-    0.57  0.070 / 0.090
G19     25.3           56.4                8.8 +/-    0.63      10.3 +/-    0.63  0.030 / 0.030
G24     272.8          43.1                7.4 +/-    1.32      10.2 +/-    1.32  0.030 / 0.030
G28     117.5          19.1               10.0 +/-    1.27      22.5 +/-    1.27  0.050 / 0.050