PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-01:27:40
G10     251.5          26.5               11.8 +/-    1.43      22.4 +/-    1.43  0.080 / 0.280
G13     53.5           30.6               10.9 +/-    2.21      18.9 +/-    2.21  0.090 / 0.300
G15     89.3           58.7               14.2 +/-    0.69      16.4 +/-    0.69  0.030 / 0.040
G16     295.9          14.7                8.2 +/-    1.93      20.7 +/-    1.93  0.030 / 0.050
G18     269.2          55.2               10.7 +/-    1.93      12.7 +/-    1.93  0.100 / 0.220
G20     44.5           46.1               11.0 +/-    0.49      14.6 +/-    0.49  0.110 / 0.220
G21     334.2          60.9               10.2 +/-    0.87      11.5 +/-    0.87  0.070 / 0.130
G26     268.1          15.1               11.1 +/-    1.39      27.4 +/-    1.39  0.120 / 0.130
G29     164.7          46.9               13.7 +/-    1.09      18.0 +/-    1.09  0.030 / 0.050