PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/29-13:58:00
G02     207.3          45.3               15.5 +/-    0.75      20.7 +/-    0.75  0.060 / 0.240
G06     134.8          78.4               11.5 +/-    0.56      11.7 +/-    0.56  0.070 / 0.200
G12     313.2          23.6                7.0 +/-    2.67      14.0 +/-    2.67  0.120 / 0.160
G17     47.9           39.3                7.9 +/-    0.56      11.6 +/-    0.56  0.110 / 0.160
G19     24.7           56.9                9.6 +/-    0.99      11.2 +/-    0.99  0.060 / 0.080
G24     286.6          41.1                8.7 +/-    2.42      12.4 +/-    2.42  0.060 / 0.080
G28     112.9          23.0                7.7 +/-    1.19      15.8 +/-    1.19  0.030 / 0.030