PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-18:27:50
G02     204.9905       32.2288         16.4771 +/-  1.3948   27.5770 +/-  1.3948  0.040 / 0.060
G06     154.8132       71.3792         13.9390 +/-  0.7850   14.6250 +/-  0.7850  0.030 / 0.060
G12     309.4102       18.2362         13.1380 +/-  1.4675   30.1857 +/-  1.4675  0.050 / 0.090
G17     40.3500        45.6188         11.2075 +/-  0.7548   14.9710 +/-  0.7548  0.050 / 0.090
G19     10.5733        62.9141         12.4135 +/-  0.2956   13.7613 +/-  0.2956  0.070 / 0.140
G24     297.8069       37.9526         13.7802 +/-  0.5808   20.7437 +/-  0.5808  0.080 / 0.090
G28     104.7223       29.7470         15.1978 +/-  1.1285   26.7555 +/-  1.1285  0.080 / 0.120