PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-14:57:40
G01     69.2           32.5               10.0 +/-    0.60      16.7 +/-    0.60  0.050 / 0.090
G07     137.9          26.8               11.9 +/-    1.08      22.3 +/-    1.08  0.050 / 0.070
G11     51.9           27.2                7.2 +/-    1.30      13.4 +/-    1.30  0.030 / 0.040
G13     275.4          36.7               12.2 +/-    2.16      18.7 +/-    2.16  0.030 / 0.030
G15     304.3          14.3                6.4 +/-    2.30      16.1 +/-    2.30  0.040 / 0.110
G17     237.7          72.8               12.6 +/-    0.82      13.1 +/-    0.82  0.040 / 0.120
G19     225.3          45.2               15.5 +/-    2.50      20.8 +/-    2.50  0.030 / 0.040
G28     21.8           58.8               10.9 +/-    0.45      12.5 +/-    0.45  0.030 / 0.080
G30     135.7          63.1               12.0 +/-    0.84      13.3 +/-    0.84  0.090 / 0.120