PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-15:58:00
G07     345.8          62.2               14.4 +/-    0.45      16.0 +/-    0.45  0.050 / 0.040
G08     87.0           53.5               13.9 +/-    0.93      16.9 +/-    0.93  0.040 / 0.040
G09     183.5          64.3               15.1 +/-    0.88      16.6 +/-    0.88  0.030 / 0.040
G11     140.8          18.4               13.9 +/-    2.77      31.7 +/-    2.77  0.040 / 0.040
G23     156.6          29.2               14.8 +/-    0.92      26.4 +/-    0.92  0.070 / 0.060
G27     47.8           26.6               10.4 +/-    1.04      19.6 +/-    1.04  0.120 / 0.070
G28     244.7          36.2               17.7 +/-    2.29      27.5 +/-    2.29  0.060 / 0.110
G30     309.2          41.2               14.7 +/-    1.34      20.9 +/-    1.34  0.050 / 0.170