PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-21:28:00
G07     33.0           69.6               17.0 +/-    0.62      18.0 +/-    0.62  0.160 / 0.380
G08     58.5           47.2               15.7 +/-    0.74      20.5 +/-    0.74  0.300 / 0.220
G09     179.8          43.4               19.3 +/-    0.56      26.6 +/-    0.56  0.030 / 0.050
G11     127.2          31.0               19.7 +/-    3.43      33.8 +/-    3.43  0.030 / 0.060
G23     159.6          10.8               22.6 +/-    1.63      62.0 +/-    1.63  0.100 / 0.100
G27     38.1           11.3               13.6 +/-    2.28      36.9 +/-    2.28  0.070 / 0.090
G28     268.2          50.0               17.3 +/-    2.78      21.8 +/-    2.78  0.060 / 0.140
G30     330.3          58.2               15.5 +/-    0.66      17.9 +/-    0.66  0.070 / 0.100