PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/29-18:57:40
G02     52.9           39.2                9.1 +/-    0.60      13.4 +/-    0.60  0.030 / 0.040
G05     70.1           66.4                9.4 +/-    0.30      10.1 +/-    0.30  0.040 / 0.040
G12     181.9          35.1                9.7 +/-    1.73      15.4 +/-    1.73  0.140 / 0.360
G13     132.4          11.2                9.5 +/-   21.19      25.9 +/-   21.19  0.110 / 0.300
G21     266.2          12.5               10.0 +/-    2.46      26.3 +/-    2.46  0.060 / 0.100
G25     244.6          55.6               10.2 +/-    0.61      12.1 +/-    0.61  0.050 / 0.080
G29     323.5          47.5                8.4 +/-    0.93      10.9 +/-    0.93  0.230 / 0.460