PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/28-21:27:50
G01     116.8          19.6               12.1 +/-    1.62      26.9 +/-    1.62  0.080 / 0.080
G07     86.3           65.5               12.6 +/-    0.40      13.7 +/-    0.40  0.050 / 0.090
G08     45.2           33.2                9.2 +/-    0.93      15.1 +/-    0.93  0.030 / 0.040
G09     177.3          24.2               13.8 +/-    1.19      27.6 +/-    1.19  0.030 / 0.030
G11     106.4          41.0               11.1 +/-    0.76      16.0 +/-    0.76  0.100 / 0.210
G13     316.6          21.0               10.4 +/-    1.68      22.4 +/-    1.68  0.080 / 0.210
G17     203.5          24.0               13.4 +/-    1.83      26.8 +/-    1.83  0.030 / 0.030
G18     92.1           21.8               10.5 +/-    1.52      22.1 +/-    1.52  0.040 / 0.030
G28     298.6          58.6               10.0 +/-    0.80      11.5 +/-    0.80  0.050 / 0.050
G30     359.5          72.4               11.9 +/-    0.68      12.4 +/-    0.68  0.050 / 0.050