PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-08:12:50
G07     336.0          58.9                3.9 +/-    0.58       4.4 +/-    0.58  0.050 / 0.060
G08     96.2           51.2                8.3 +/-    0.96      10.3 +/-    0.96  0.040 / 0.060
G09     186.2          72.5                7.2 +/-    0.99       7.5 +/-    0.99  0.140 / 0.100
G11     144.3          12.9                6.8 +/-    1.65      17.9 +/-    1.65  0.100 / 0.110
G16     46.4           10.7                2.6 +/-    2.13       7.0 +/-    2.13  0.040 / 0.030
G23     156.0          43.7                9.3 +/-    0.57      12.8 +/-    0.57  0.040 / 0.040
G27     54.3           30.8                4.7 +/-    2.27       8.1 +/-    2.27  0.130 / 0.300
G28     237.5          30.0                8.3 +/-    1.84      14.6 +/-    1.84  0.120 / 0.480
G30     301.2          34.0                2.6 +/-    1.22       4.2 +/-    1.22  0.050 / 0.040