PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-20:42:30
G03     185.5          11.5               14.7 +/-    2.56      39.6 +/-    2.56  0.050 / 0.130
G07     298.7          41.9               10.7 +/-    1.07      15.0 +/-    1.07  0.050 / 0.140
G08     137.9          34.2               13.9 +/-    0.69      22.4 +/-    0.69  0.060 / 0.090
G09     316.3          70.4               10.6 +/-    0.52      11.2 +/-    0.52  0.060 / 0.090
G16     41.6           31.2                9.0 +/-    0.59      15.3 +/-    0.59  0.060 / 0.090
G23     135.6          69.3               11.8 +/-    0.63      12.5 +/-    0.63  0.040 / 0.080
G27     87.8           36.3                9.8 +/-    0.60      15.2 +/-    0.60  0.130 / 0.330
G30     281.7          20.8                9.8 +/-    0.99      21.1 +/-    0.99  0.170 / 0.410