PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/09-21:57:40
G02     88.5           11.0               10.5 +/-    1.46      28.7 +/-    1.46  0.060 / 0.100
G05     45.8           26.3                7.6 +/-    1.62      14.3 +/-    1.62  0.060 / 0.120
G13     89.6           35.4               10.9 +/-    0.67      17.2 +/-    0.67  0.210 / 0.380
G15     142.3          43.2               13.4 +/-    0.62      18.5 +/-    0.62  0.210 / 0.450
G20     235.5          2.8                 8.7 +/-    3.53      26.9 +/-    3.53  0.110 / 0.340
G21     302.5          39.3               10.8 +/-    1.21      15.9 +/-    1.21  0.100 / 0.350
G25     204.4          19.3               10.7 +/-    1.61      23.9 +/-    1.61  0.030 / 0.030
G26     297.0          20.8               11.4 +/-    1.22      24.6 +/-    1.22  0.030 / 0.030
G29     128.8          85.9                9.7 +/-    0.89       9.7 +/-    0.89  0.040 / 0.110