PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/30-18:42:30
G07     301.8          43.6               12.7 +/-    2.98      17.5 +/-    2.98  0.060 / 0.080
G08     137.2          36.2               15.6 +/-    0.54      24.2 +/-    0.54  0.050 / 0.080
G09     312.8          73.7               12.2 +/-    0.38      12.7 +/-    0.38  0.040 / 0.040
G16     41.7           27.4               10.1 +/-    1.45      18.7 +/-    1.45  0.040 / 0.050
G23     139.3          64.4               13.2 +/-    0.60      14.5 +/-    0.60  0.120 / 0.130
G27     84.0           36.8               12.9 +/-    1.30      19.8 +/-    1.30  0.170 / 0.130
G30     283.6          21.6               12.7 +/-    3.04      27.0 +/-    3.04  0.100 / 0.250