PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/22-21:43:10
G01     120.1          17.2               15.1 +/-    1.01      35.6 +/-    1.01  0.040 / 0.080
G07     76.6           67.4               13.9 +/-    0.39      14.9 +/-    0.39  0.040 / 0.070
G08     46.8           36.2               11.5 +/-    1.06      17.8 +/-    1.06  0.080 / 0.210
G09     177.9          28.0               17.3 +/-    3.10      31.6 +/-    3.10  0.080 / 0.250
G11     111.5          39.3               14.7 +/-    0.54      21.6 +/-    0.54  0.030 / 0.050
G13     318.5          18.0               11.7 +/-    1.62      27.0 +/-    1.62  0.030 / 0.050
G17     202.5          20.5               18.7 +/-    2.92      40.8 +/-    2.92  0.040 / 0.060
G18     7.0            -18.8              22.4 +/-    1.54      50.8 +/-    1.54  0.040 / 0.070
G28     291.6          57.2               15.1 +/-    0.81      17.6 +/-    0.81  0.080 / 0.190
G30     351.5          69.6               12.4 +/-    0.51      13.2 +/-    0.51  0.090 / 0.180