PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-02:27:50
G10     276.8603       42.7804         10.7651 +/-  0.9724   14.9871 +/-  0.9724  0.070 / 0.070
G13     39.0269        12.4340          6.1932 +/-  0.7257   16.3720 +/-  0.7257  0.050 / 0.060
G15     53.0324        44.3490          7.7895 +/-  0.3632   10.5951 +/-  0.3632  0.080 / 0.140
G18     317.5440       65.8462          9.6929 +/-  1.0422   10.5162 +/-  1.0422  0.070 / 0.140
G20     61.5292        26.6469          6.4113 +/-  1.2797   12.0694 +/-  1.2797  0.070 / 0.160
G21     30.7295        76.4395         10.3214 +/-  0.4551   10.5862 +/-  0.4551  0.060 / 0.140
G24     113.6836       19.0871         11.6114 +/-  1.1731   26.1261 +/-  1.1731  0.120 / 0.230
G27     312.3714       26.8900         11.0047 +/-  1.3598   20.6048 +/-  1.3598  0.110 / 0.190
G29     168.0577       20.3020         11.2358 +/-  1.7851   24.5411 +/-  1.7851  0.050 / 0.040
G32     206.2217       17.1929         14.9792 +/-  3.5925   35.3112 +/-  3.5925  0.040 / 0.040