PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-13:12:40
G01     120.9          16.3                8.9 +/-    1.90      21.4 +/-    1.90  0.090 / 0.130
G07     79.4           65.0                6.9 +/-    0.52       7.5 +/-    0.52  0.100 / 0.110
G08     45.5           31.8                5.1 +/-    0.78       8.7 +/-    0.78  0.040 / 0.030
G09     175.6          26.7                6.2 +/-    1.59      11.6 +/-    1.59  0.040 / 0.030
G11     106.8          37.5                9.0 +/-    0.61      13.7 +/-    0.61  0.030 / 0.030
G13     319.7          15.6                4.0 +/-    1.31       9.8 +/-    1.31  0.040 / 0.030
G17     200.4          24.4                6.2 +/-    3.22      12.3 +/-    3.22  0.170 / 0.270
G28     288.7          56.3                5.8 +/-    1.33       6.8 +/-    1.33  0.120 / 0.320
G30     339.1          64.5                6.3 +/-    0.96       6.9 +/-    0.96  0.190 / 0.220