PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-14:57:40
G01     109.8017       23.7230         10.7404 +/-  1.0961   21.6162 +/-  1.0961  0.090 / 0.220
G08     42.1063        21.2652          4.8086 +/- 16.6917   10.2605 +/- 16.6917  0.130 / 0.250
G09     174.4767       15.4935         12.0377 +/-  2.6029   29.5847 +/-  2.6029  0.030 / 0.040
G11     90.1944        40.3304         11.6880 +/-  0.3993   16.9089 +/-  0.3993  0.030 / 0.040
G13     313.2140       24.9352         11.2734 +/-  2.4125   22.0602 +/-  2.4125  0.050 / 0.130
G17     203.9366       36.9919         12.2871 +/-  1.9833   18.8087 +/-  1.9833  0.050 / 0.090
G19     207.9814       11.6948          7.1338 +/- 18.2504   19.1787 +/- 18.2504  0.100 / 0.200
G28     311.5542       60.1135        -15.9794 +/- 55.1269  -18.1292 +/- 55.1269  0.100 / 0.280
G30     1.7411         74.4685         12.3063 +/-  0.9865   12.7230 +/-  0.9865  0.040 / 0.090