PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-18:28:10
G02     204.5986       30.7706         14.7933 +/-  1.3996   25.4971 +/-  1.3996  0.040 / 0.060
G06     157.2666       69.9964         11.3691 +/-  0.7248   12.0185 +/-  0.7248  0.030 / 0.060
G12     308.6784       17.1955         10.4008 +/-  1.9024   24.5168 +/-  1.9024  0.110 / 0.260
G17     39.1380        46.6482         10.6501 +/-  0.4454   14.0260 +/-  0.4454  0.100 / 0.190
G19     7.9661         63.8185         10.7106 +/-  0.3335   11.7915 +/-  0.3335  0.060 / 0.090
G24     299.3032       37.2777         11.5359 +/-  0.7073   17.5702 +/-  0.7073  0.060 / 0.100
G28     103.3967       30.6787         12.3454 +/-  0.7813   21.3181 +/-  0.7813  0.050 / 0.050