PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-13:27:50
G01     115.1          20.5                8.9 +/-    1.47      19.3 +/-    1.47  0.100 / 0.130
G07     93.9           61.2                7.3 +/-    0.73       8.2 +/-    0.73  0.090 / 0.140
G08     43.2           26.0                6.3 +/-    0.71      11.9 +/-    0.71  0.060 / 0.100
G09     174.8          20.1                8.3 +/-    1.36      18.3 +/-    1.36  0.080 / 0.100
G11     98.1           39.6                8.5 +/-    0.55      12.5 +/-    0.55  0.030 / 0.040
G13     316.6          20.8                4.4 +/-    2.55       9.6 +/-    2.55  0.030 / 0.040
G17     202.1          31.3                8.2 +/-    1.53      14.0 +/-    1.53  0.040 / 0.040
G28     301.0          58.7                5.6 +/-    0.73       6.5 +/-    0.73  0.040 / 0.030
G30     349.8          70.2                5.6 +/-    0.76       6.0 +/-    0.76  0.100 / 0.350