PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-01:27:40
G10     248.4250       23.8736         10.2518 +/-  1.3326   20.5604 +/-  1.3326  0.080 / 0.160
G13     56.9396        32.5210          9.5453 +/-  0.9005   15.8835 +/-  0.9005  0.100 / 0.140
G15     97.4320        58.8321         12.5878 +/-  0.4350   14.4456 +/-  0.4350  0.060 / 0.060
G16     299.4092       14.7828          5.4023 +/-  1.7457   13.5084 +/-  1.7457  0.040 / 0.050
G18     263.9614       52.8340         10.9986 +/-  0.8212   13.4163 +/-  0.8212  0.120 / 0.460
G20     42.0771        49.2322          9.5919 +/-  0.6029   12.2127 +/-  0.6029  0.120 / 0.440
G21     329.7621       58.2746          9.0087 +/-  0.6401   10.3918 +/-  0.6401  0.130 / 0.400
G26     271.5871       16.4719          7.5670 +/-  1.7560   18.1570 +/-  1.7560  0.180 / 0.430
G29     163.6722       51.0636          9.3733 +/-  1.9394   11.6701 +/-  1.9394  0.040 / 0.060