PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-14:28:00
G03     189.1          17.4               11.8 +/-    1.84      27.6 +/-    1.84  0.060 / 0.110
G07     293.5          39.1               11.8 +/-    1.72      17.4 +/-    1.72  0.080 / 0.090
G08     140.9          30.3               15.4 +/-    1.17      26.7 +/-    1.17  0.150 / 0.130
G09     319.6          66.8               11.5 +/-    0.48      12.4 +/-    0.48  0.150 / 0.160
G16     42.0           33.6                9.6 +/-    1.64      15.6 +/-    1.64  0.180 / 0.340
G23     127.8          72.0               12.9 +/-    0.75      13.5 +/-    0.75  0.110 / 0.270
G27     94.9           35.1               11.7 +/-    0.85      18.6 +/-    0.85  0.030 / 0.030
G30     276.6          15.1               10.5 +/-    1.36      26.2 +/-    1.36  0.030 / 0.030