PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-19:12:40
G02     22.3           63.8               10.0 +/-    0.66      11.0 +/-    0.66  0.040 / 0.050
G05     157.5          52.1               11.1 +/-    0.63      13.7 +/-    0.63  0.040 / 0.040
G06     50.0           22.0                7.6 +/-    2.47      16.0 +/-    2.47  0.020 / 0.030
G12     213.9          75.3               10.1 +/-    1.14      10.4 +/-    1.14  0.030 / 0.030
G19     94.8           12.8                8.5 +/-    1.42      22.3 +/-    1.42  0.040 / 0.040
G20     197.3          19.6               11.7 +/-    2.50      26.0 +/-    2.50  0.030 / 0.030
G25     303.4          52.0               10.3 +/-    3.28      12.7 +/-    3.28  0.090 / 0.130
G29     303.0          24.6                9.4 +/-    1.05      18.5 +/-    1.05  0.160 / 0.090