PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-02:27:50
G10     279.1          43.9               12.6 +/-    1.21      17.2 +/-    1.21  0.180 / 0.260
G13     38.5           10.9               10.5 +/-    6.03      28.8 +/-    6.03  0.180 / 0.330
G15     51.8           42.7               11.6 +/-    0.61      16.2 +/-    0.61  0.030 / 0.030
G18     322.0          66.2               12.5 +/-    0.47      13.5 +/-    0.47  0.040 / 0.030
G20     62.8           25.4               11.5 +/-    1.50      22.2 +/-    1.50  0.130 / 0.180
G21     38.7           77.0               11.7 +/-    0.87      12.0 +/-    0.87  0.110 / 0.180
G24     112.0          20.1               12.5 +/-    0.96      27.3 +/-    0.96  0.040 / 0.050
G27     311.0          28.1                9.6 +/-    1.32      17.5 +/-    1.32  0.060 / 0.060
G29     168.1          18.5               14.0 +/-    1.39      31.9 +/-    1.39  0.070 / 0.090
G32     206.7          18.9               13.3 +/-    2.89      30.1 +/-    2.89  0.070 / 0.090