PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-08:27:50
G01     320.0          15.2               -4.4 +/-   27.44     -10.8 +/-   27.44  0.030 / 0.040
G08     262.6          14.7                5.5 +/-    1.41      13.8 +/-    1.41  0.030 / 0.040
G10     74.6           55.0                4.2 +/-    0.43       5.0 +/-    0.43  0.160 / 0.260
G11     306.6          20.8                4.5 +/-    1.66       9.8 +/-    1.66  0.170 / 0.250
G14     277.8          66.4                5.2 +/-    0.77       5.7 +/-    0.77  0.190 / 0.280
G18     307.8          37.2                4.6 +/-    1.26       7.0 +/-    1.26  0.210 / 0.230
G20     107.3          17.1                4.3 +/-    0.88      10.1 +/-    0.88  0.140 / 0.250
G27     226.0          10.6                4.9 +/-    1.11      13.4 +/-    1.11  0.170 / 0.340
G31     174.8          40.4                4.7 +/-    1.06       6.8 +/-    1.06  0.130 / 0.300
G32     5.5            68.6                4.5 +/-    0.41       4.8 +/-    0.41  0.100 / 0.340