PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-23:28:00
G02     357.7          75.8               11.5 +/-    0.35      11.8 +/-    0.35  0.020 / 0.020
G05     161.4          38.1               16.1 +/-    1.40      24.2 +/-    1.40  0.020 / 0.020
G06     42.9           35.8               10.6 +/-    1.74      16.5 +/-    1.74  0.210 / 0.440
G12     302.0          75.8               11.3 +/-    0.93      11.6 +/-    0.93  0.300 / 0.480
G17     88.3           11.3               11.7 +/-    2.28      31.7 +/-    2.28  0.050 / 0.050
G19     77.7           26.4               10.7 +/-    2.21      20.2 +/-    2.21  0.040 / 0.050
G24     225.1          19.9               16.9 +/-    4.13      37.3 +/-    4.13  0.090 / 0.160
G25     316.6          31.8               11.0 +/-    1.49      18.5 +/-    1.49  0.070 / 0.090