PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/17-16:12:30
G01     237.4          26.7               10.4 +/-    1.79      19.5 +/-    1.79  0.090 / 0.130
G03     306.6          62.0               10.3 +/-    0.84      11.5 +/-    0.84  0.090 / 0.120
G14     72.7           34.5                7.3 +/-    2.08      11.7 +/-    2.08  0.090 / 0.120
G16     155.8          31.7               15.5 +/-    1.70      26.2 +/-    1.70  0.110 / 0.090
G22     256.6          76.9               11.2 +/-    0.80      11.5 +/-    0.80  0.060 / 0.060
G23     298.4          30.3                9.5 +/-    1.45      16.5 +/-    1.45  0.080 / 0.060
G31     41.5           43.3                7.4 +/-    1.37      10.3 +/-    1.37  0.030 / 0.030
G32     89.2           13.4                8.6 +/-    3.15      22.3 +/-    3.15  0.030 / 0.030