PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/20-22:57:40
G08     318.8          12.9               11.5 +/-    1.94      29.9 +/-    1.94  0.040 / 0.040
G10     306.3          54.2               13.6 +/-    0.71      16.4 +/-    0.71  0.050 / 0.030
G14     212.1          19.4               19.5 +/-    2.52      43.7 +/-    2.52  0.040 / 0.040
G15     45.5           22.8               10.6 +/-    2.36      21.7 +/-    2.36  0.030 / 0.040
G18     12.6           64.5               13.6 +/-    0.82      14.9 +/-    0.82  0.100 / 0.120
G20     76.2           13.5               11.7 +/-    2.46      30.2 +/-    2.46  0.100 / 0.100
G21     114.8          68.0               16.4 +/-    0.44      17.5 +/-    0.44  0.190 / 0.360
G24     91.8           28.8               15.9 +/-    1.55      28.5 +/-    1.55  0.310 / 0.320
G27     291.0          37.2               13.4 +/-    3.80      20.5 +/-    3.80  0.040 / 0.080
G32     214.4          35.7               17.3 +/-    1.90      27.1 +/-    1.90  0.050 / 0.080