PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-19:28:10
G02     218.7315       58.2600         13.8365 +/-  0.4269   15.9629 +/-  0.4269  0.060 / 0.100
G06     51.7813        71.2643         12.0817 +/-  0.5044   12.6839 +/-  0.5044  0.050 / 0.130
G12     320.1626       40.4674         10.9198 +/-  0.9838   15.7626 +/-  0.9838  0.060 / 0.080
G17     61.7195        28.2141          9.3359 +/-  0.5126   16.9806 +/-  0.5126  0.050 / 0.070
G19     45.3676        45.4892         10.2280 +/-  0.3597   13.6875 +/-  0.3597  0.060 / 0.090
G24     263.8701       40.8692         12.9226 +/-  0.7362   18.5336 +/-  0.7362  0.060 / 0.090
G28     124.9734       11.1095         11.6179 +/-  3.1380   31.6434 +/-  3.1380  0.040 / 0.070