PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-01:27:50
G10     251.5          26.5               13.2 +/-    1.74      24.9 +/-    1.74  0.160 / 0.110
G13     53.5           30.6               11.9 +/-    1.22      20.6 +/-    1.22  0.110 / 0.140
G15     89.3           58.7               12.9 +/-    0.71      14.8 +/-    0.71  0.050 / 0.050
G16     295.9          14.7                9.9 +/-    3.47      24.9 +/-    3.47  0.060 / 0.060
G18     269.2          55.2               13.8 +/-    1.26      16.3 +/-    1.26  0.050 / 0.060
G20     44.5           46.1               10.5 +/-    0.58      13.9 +/-    0.58  0.050 / 0.050
G21     334.2          60.9               11.2 +/-    1.10      12.6 +/-    1.10  0.080 / 0.370
G26     268.1          15.1               11.9 +/-    2.46      29.6 +/-    2.46  0.090 / 0.340
G29     164.7          46.9               13.3 +/-    0.59      17.5 +/-    0.59  0.110 / 0.250