PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-22:27:50
G07     334.8          58.5               11.6 +/-    1.42      13.3 +/-    1.42  0.030 / 0.050
G08     100.0          52.8               13.0 +/-    1.11      15.9 +/-    1.11  0.030 / 0.060
G09     192.6          72.9               14.2 +/-    0.58      14.8 +/-    0.58  0.090 / 0.160
G11     147.1          13.2               11.9 +/-    3.82      31.0 +/-    3.82  0.090 / 0.140
G23     155.5          38.7               13.0 +/-    0.52      19.3 +/-    0.52  0.080 / 0.100
G27     53.0           30.2                9.8 +/-    0.97      17.0 +/-    0.97  0.070 / 0.080
G28     238.9          31.4               11.0 +/-    2.20      18.8 +/-    2.20  0.030 / 0.050
G30     306.0          39.8               10.3 +/-    0.98      15.0 +/-    0.98  0.030 / 0.050