PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-20:12:30
G10     252.0          28.1               12.7 +/-    2.31      23.2 +/-    2.31  0.040 / 0.070
G13     52.0           28.7                8.4 +/-    1.42      15.2 +/-    1.42  0.040 / 0.050
G15     92.1           60.0               11.0 +/-    0.43      12.5 +/-    0.43  0.160 / 0.740
G16     293.5          15.6                9.2 +/-    2.96      22.7 +/-    2.96  0.200 / 0.650
G20     272.0          51.8               10.3 +/-    1.25      12.7 +/-    1.25  0.080 / 0.220
G21     336.1          61.3               10.5 +/-    0.64      11.8 +/-    0.64  0.060 / 0.150
G26     266.2          14.9               10.4 +/-    2.58      26.0 +/-    2.58  0.030 / 0.050
G29     165.2          48.7               11.2 +/-    0.79      14.4 +/-    0.79  0.030 / 0.050