PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-21:27:30
G07     38.7           69.8               13.4 +/-    0.70      14.1 +/-    0.70  0.110 / 0.410
G08     56.5           46.0               11.6 +/-    0.98      15.4 +/-    0.98  0.080 / 0.310
G09     179.6          41.4               14.8 +/-    0.44      21.1 +/-    0.44  0.090 / 0.110
G11     125.5          32.2               13.5 +/-    0.93      22.6 +/-    0.93  0.090 / 0.110
G27     37.6           9.9                 8.8 +/-    3.42      24.5 +/-    3.42  0.040 / 0.060
G28     270.8          51.1               13.0 +/-    3.34      16.1 +/-    3.34  0.040 / 0.060
G30     332.4          59.6               12.0 +/-    0.64      13.7 +/-    0.64  0.020 / 0.030