PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-19:43:10
G02     17.1           66.7                7.5 +/-    0.68       8.1 +/-    0.68  0.030 / 0.060
G05     154.3          50.7               12.0 +/-    1.08      15.0 +/-    1.08  0.030 / 0.050
G06     48.3           23.6                8.7 +/-    0.84      17.5 +/-    0.84  0.020 / 0.040
G12     213.5          78.0               10.0 +/-    0.82      10.2 +/-    0.82  0.030 / 0.030
G19     88.8           19.6               10.9 +/-    0.97      24.3 +/-    0.97  0.050 / 0.100
G25     309.9          44.8                8.1 +/-    2.50      10.9 +/-    2.50  0.060 / 0.080
G29     298.1          18.3                8.9 +/-    1.39      20.4 +/-    1.39  0.040 / 0.050