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                8.8 +/-    0.62       9.5 +/-    0.62  0.030 / 0.050
G05     154.3          50.7               11.2 +/-    0.73      14.0 +/-    0.73  0.040 / 0.040
G06     48.3           23.6                9.7 +/-    2.39      19.7 +/-    2.39  0.400 / 0.530
G12     213.5          78.0               10.7 +/-    0.38      10.9 +/-    0.38  0.190 / 0.390
G19     88.8           19.6               10.8 +/-    0.88      23.9 +/-    0.88  0.020 / 0.020
G24     215.0          10.5                9.6 +/-   25.18      26.4 +/-   25.18  0.020 / 0.030
G25     309.9          44.8                9.9 +/-    1.21      13.3 +/-    1.21  0.080 / 0.060
G29     298.1          18.3               10.1 +/-    2.79      23.2 +/-    2.79  0.060 / 0.070