PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-16:57:50
G02     207.2          41.2               11.5 +/-    0.96      16.5 +/-    0.96  0.070 / 0.060
G06     135.1          77.4               11.9 +/-    0.66      12.1 +/-    0.66  0.070 / 0.070
G12     312.8          23.2               10.2 +/-    0.82      20.8 +/-    0.82  0.090 / 0.080
G17     46.6           40.3                9.8 +/-    0.85      14.2 +/-    0.85  0.070 / 0.060
G19     22.5           58.0               11.4 +/-    1.52      13.1 +/-    1.52  0.090 / 0.150
G24     289.0          40.7               12.7 +/-    5.78      18.2 +/-    5.78  0.130 / 0.160
G28     111.4          24.5                9.2 +/-    1.28      18.1 +/-    1.28  0.050 / 0.070