PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/09-20:43:10
G10     245.3          22.3               12.6 +/-    2.37      26.2 +/-    2.37  0.160 / 0.450
G13     59.9           32.9                9.1 +/-    1.41      15.0 +/-    1.41  0.160 / 0.430
G15     111.2          59.0               11.7 +/-    0.49      13.4 +/-    0.49  0.040 / 0.040
G16     301.4          15.6                7.1 +/-    1.94      17.5 +/-    1.94  0.030 / 0.050
G20     261.5          46.4               11.3 +/-    3.36      15.0 +/-    3.36  0.080 / 0.110
G21     326.1          55.5               10.4 +/-    0.73      12.3 +/-    0.73  0.090 / 0.130
G26     273.7          17.9               10.1 +/-    1.20      23.3 +/-    1.20  0.030 / 0.020
G29     162.8          58.1               11.4 +/-    0.50      13.2 +/-    0.50  0.030 / 0.040