PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-20:57:50
G10     310.5          56.2                9.1 +/-    1.66      10.8 +/-    1.66  0.030 / 0.050
G14     212.2          15.6               14.5 +/-    1.40      35.6 +/-    1.40  0.040 / 0.030
G15     45.6           21.8                8.5 +/-    2.47      17.9 +/-    2.47  0.160 / 0.350
G20     12.0           64.1               10.2 +/-    0.78      11.2 +/-    0.78  0.170 / 0.360
G21     113.7          69.9               11.5 +/-    0.91      12.2 +/-    0.91  0.110 / 0.210
G24     91.5           29.0               11.3 +/-    1.23      20.2 +/-    1.23  0.150 / 0.260
G27     292.9          36.8                9.3 +/-    2.86      14.2 +/-    2.86  0.100 / 0.070
G32     213.2          39.4               12.3 +/-    0.97      18.1 +/-    0.97  0.080 / 0.100