PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-21:13:00
G02     22.8           63.1                9.1 +/-    1.00      10.1 +/-    1.00  0.040 / 0.070
G05     152.6          55.6               11.2 +/-    0.75      13.3 +/-    0.75  0.040 / 0.060
G06     51.4           19.5                6.7 +/-    1.15      14.9 +/-    1.15  0.030 / 0.050
G12     204.3          72.4                9.6 +/-    0.94      10.0 +/-    0.94  0.040 / 0.050
G19     96.8           11.3                8.8 +/-    2.35      24.0 +/-    2.35  0.030 / 0.040
G20     197.2          22.4               14.2 +/-    0.97      29.5 +/-    0.97  0.020 / 0.040
G25     300.0          54.1                9.8 +/-    1.31      11.8 +/-    1.31  0.080 / 0.130
G29     304.3          25.4                9.6 +/-    1.48      18.6 +/-    1.48  0.060 / 0.120