PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-17:27:40
G07     34.9           69.7               10.7 +/-    0.87      11.3 +/-    0.87  0.040 / 0.060
G08     56.7           45.7               10.9 +/-    1.04      14.5 +/-    1.04  0.040 / 0.050
G09     179.0          41.9               11.0 +/-    1.09      15.5 +/-    1.09  0.030 / 0.040
G11     124.8          31.9               11.1 +/-    0.78      18.7 +/-    0.78  0.030 / 0.030
G18     109.0          13.9               10.8 +/-    2.59      27.5 +/-    2.59  0.030 / 0.030
G27     38.0           11.2                9.8 +/-    4.05      26.7 +/-    4.05  0.030 / 0.040
G28     268.7          50.1               11.1 +/-    3.19      14.0 +/-    3.19  0.130 / 0.100
G30     328.2          56.9                9.8 +/-    0.52      11.5 +/-    0.52  0.120 / 0.070