PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-13:27:50
G01     67.1           32.2                8.3 +/-    1.46      13.9 +/-    1.46  0.040 / 0.110
G07     138.9          25.6                8.6 +/-    0.79      16.6 +/-    0.79  0.040 / 0.110
G11     50.9           26.3                7.8 +/-    1.65      14.8 +/-    1.65  0.120 / 0.280
G13     273.2          36.4                8.6 +/-    1.32      13.3 +/-    1.32  0.150 / 0.350
G15     301.8          15.1                2.9 +/-    1.66       7.2 +/-    1.66  0.050 / 0.080
G17     242.6          74.4                7.6 +/-    0.44       7.9 +/-    0.44  0.050 / 0.080
G19     226.9          46.9                9.3 +/-    1.00      12.2 +/-    1.00  0.110 / 0.160
G28     25.3           58.3                7.2 +/-    0.48       8.3 +/-    0.48  0.090 / 0.200
G30     137.8          60.8                9.3 +/-    0.58      10.5 +/-    0.58  0.040 / 0.040