PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-18:43:10
G02     34.9           53.9                9.6 +/-    1.00      11.6 +/-    1.00  0.020 / 0.030
G05     130.8          65.7               11.2 +/-    0.31      12.2 +/-    0.31  0.030 / 0.030
G06     57.1           10.3                7.8 +/-    1.86      21.6 +/-    1.86  0.050 / 0.070
G12     186.7          58.8               11.0 +/-    0.46      12.7 +/-    0.46  0.040 / 0.040
G19     102.6          9.7                10.9 +/-    1.83      30.7 +/-    1.83  0.040 / 0.040
G25     287.7          56.9               10.6 +/-    4.41      12.4 +/-    4.41  0.040 / 0.040
G29     309.9          30.3                9.6 +/-    1.08      16.7 +/-    1.08  0.140 / 0.180