PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-19:27:40
G08     309.6          18.9                8.0 +/-    1.28      18.2 +/-    1.28  0.060 / 0.080
G10     338.3          61.0                7.8 +/-    0.53       8.8 +/-    0.53  0.050 / 0.080
G14     218.4          28.2                6.2 +/-    2.60      11.3 +/-    2.60  0.170 / 0.240
G20     43.4           58.5                8.3 +/-    0.84       9.5 +/-    0.84  0.190 / 0.200
G21     135.6          56.4               10.6 +/-    0.52      12.5 +/-    0.52  0.040 / 0.040
G24     74.2           30.6                8.9 +/-    1.58      15.5 +/-    1.58  0.030 / 0.050
G27     273.4          37.7                9.5 +/-    1.41      14.3 +/-    1.41  0.060 / 0.080
G32     223.5          54.7               10.4 +/-    2.14      12.5 +/-    2.14  0.070 / 0.090