PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-16:12:30
G01     70.5530        32.6063         12.0715 +/-  1.1514   20.0537 +/-  1.1514  0.070 / 0.120
G11     52.5421        27.7473          8.3965 +/-  1.7355   15.4276 +/-  1.7355  0.070 / 0.140
G13     276.7826       36.8911         12.1870 +/-  1.3302   18.6887 +/-  1.3302  0.030 / 0.040
G15     306.1926       13.5290          9.2785 +/-  1.5981   23.9080 +/-  1.5981  0.030 / 0.040
G17     234.8501       71.6970         12.9254 +/-  0.8908   13.5393 +/-  0.8908  0.030 / 0.040
G19     224.2589       44.0544         15.6964 +/-  2.2289   21.4418 +/-  2.2289  0.030 / 0.080
G28     19.3492        59.1775         12.0761 +/-  0.5212   13.8151 +/-  0.5212  0.120 / 0.190
G30     134.1504       64.5692         13.2046 +/-  0.8009   14.4565 +/-  0.8009  0.080 / 0.190