PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-02:57:40
G10     295.3          51.8                9.8 +/-    2.46      12.1 +/-    2.46  0.050 / 0.030
G15     46.3           29.2                8.2 +/-    1.12      14.7 +/-    1.12  0.060 / 0.050
G20     346.5          65.3                9.8 +/-    0.78      10.7 +/-    0.78  0.110 / 0.030
G21     87.3           75.4               10.5 +/-    0.60      10.8 +/-    0.60  0.050 / 0.030
G24     100.4          25.6                9.7 +/-    1.73      18.6 +/-    1.73  0.040 / 0.030
G27     303.9          32.7                7.0 +/-    3.05      11.7 +/-    3.05  0.040 / 0.040
G32     209.8          27.5               14.3 +/-    0.90      26.3 +/-    0.90  0.160 / 0.040