PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-08:12:50
G01     250.0608       34.9669          4.8678 +/-  1.4034    7.7299 +/-  1.4034  0.090 / 0.210
G03     315.8500       41.9271          3.9558 +/-  1.4797    5.5797 +/-  1.4797  0.080 / 0.220
G11     233.9745       12.6901          3.6734 +/-  3.8483    9.6533 +/-  3.8483  0.040 / 0.050
G14     62.2041        38.9851          2.9227 +/-  0.6306    4.3231 +/-  0.6306  0.030 / 0.040
G16     163.2489       18.5897          4.3429 +/-  1.3757    9.8918 +/-  1.3757  0.120 / 0.300
G22     303.5078       68.0916          5.1712 +/-  1.0084    5.5286 +/-  1.0084  0.120 / 0.340
G23     286.4432       18.6516          3.2537 +/-  2.0671    7.3996 +/-  2.0671  0.050 / 0.130
G26     136.9055       37.9661          4.8479 +/-  0.9544    7.2960 +/-  0.9544  0.060 / 0.140
G31     40.5172        57.7529          2.5674 +/-  1.0071    2.9762 +/-  1.0071  0.080 / 0.120
G32     77.5603        23.0117          1.9109 +/-  1.2122    3.9108 +/-  1.2122  0.070 / 0.110