PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-03:27:50
G08     294.3          22.9                7.6 +/-    1.32      15.6 +/-    1.32  0.070 / 0.080
G10     5.4            63.0                8.5 +/-    1.06       9.4 +/-    1.06  0.080 / 0.120
G14     228.8          43.2                9.1 +/-    1.55      12.6 +/-    1.55  0.050 / 0.070
G20     37.8           63.6               16.3 +/-    1.11      18.0 +/-    1.11  0.040 / 0.070
G21     146.2          42.3                9.5 +/-    1.09      13.4 +/-    1.09  0.060 / 0.110
G24     56.0           25.2                7.2 +/-    3.24      14.0 +/-    3.24  0.060 / 0.100
G27     255.5          32.1                8.0 +/-    3.39      13.4 +/-    3.39  0.190 / 0.100
G32     245.7          68.9                8.5 +/-    0.54       9.0 +/-    0.54  0.160 / 0.170