PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-14:57:40
G03     237.7          69.3               10.5 +/-    0.30      11.2 +/-    0.30  0.030 / 0.040
G09     301.8          15.8                6.5 +/-    1.97      15.9 +/-    1.97  0.030 / 0.040
G14     96.6           19.1                7.9 +/-    1.68      17.8 +/-    1.68  0.110 / 0.270
G16     128.6          57.6               11.0 +/-    0.71      12.8 +/-    0.71  0.080 / 0.210
G22     189.9          54.6               10.7 +/-    0.44      12.8 +/-    0.44  0.050 / 0.040
G23     320.9          51.0                9.4 +/-    1.42      11.7 +/-    1.42  0.050 / 0.050
G26     70.8           51.5                8.7 +/-    0.51      10.7 +/-    0.51  0.040 / 0.050
G31     51.6           19.7                7.8 +/-    1.48      17.3 +/-    1.48  0.050 / 0.060