PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-22:27:30
G02     44.8750        46.3210          9.7055 +/-  0.5555   12.8392 +/-  0.5555  0.030 / 0.050
G05     101.1768       70.6758         10.8656 +/-  0.6566   11.4431 +/-  0.6566  0.040 / 0.050
G12     187.0432       47.0329         12.8810 +/-  1.5123   16.8762 +/-  1.5123  0.020 / 0.040
G20     200.7874       45.6338         15.6360 +/-  1.5349   20.8822 +/-  1.5349  0.040 / 0.040
G25     255.1664       59.4267         12.9026 +/-  0.5743   14.7275 +/-  0.5743  0.040 / 0.080
G29     319.5587       42.6970         11.0335 +/-  1.3223   15.3802 +/-  1.3223  0.040 / 0.070