PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/31-13:57:40
G02     37.7           51.4                6.3 +/-    1.16       7.8 +/-    1.16  0.030 / 0.040
G05     133.9          66.7                6.6 +/-    0.71       7.1 +/-    0.71  0.030 / 0.040
G06     57.7           10.6                5.8 +/-    2.02      15.9 +/-    2.02  0.120 / 0.240
G12     190.8          59.3                7.9 +/-    0.91       9.0 +/-    0.91  0.180 / 0.330
G25     278.3          59.7               -1.8 +/-    1.94      -2.1 +/-    1.94  0.030 / 0.040
G29     312.3          33.4                2.0 +/-    1.73       3.3 +/-    1.73  0.030 / 0.040