PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/16-01:57:40
G08     307.3          20.3                6.8 +/-    1.80      14.8 +/-    1.80  0.090 / 0.080
G10     331.9          59.9                8.7 +/-    0.32       9.9 +/-    0.32  0.070 / 0.060
G14     218.7          33.5               12.6 +/-    1.42      20.6 +/-    1.42  0.030 / 0.040
G15     46.9           11.6                7.6 +/-    2.27      20.4 +/-    2.27  0.030 / 0.040
G18     38.3           59.7                8.6 +/-    0.38       9.8 +/-    0.38  0.060 / 0.070
G21     134.8          55.8               11.9 +/-    0.42      14.0 +/-    0.42  0.090 / 0.080
G24     74.5           30.6                8.8 +/-    1.04      15.2 +/-    1.04  0.030 / 0.020
G27     271.6          37.4               10.8 +/-    2.48      16.4 +/-    2.48  0.020 / 0.020
G32     224.4          51.7               11.7 +/-    2.02      14.4 +/-    2.02  0.050 / 0.060