PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-15:12:30
G03     221.6          64.7               10.6 +/-    1.30      11.6 +/-    1.30  0.030 / 0.040
G09     305.6          20.7                6.8 +/-    1.28      14.7 +/-    1.28  0.040 / 0.030
G14     102.0          14.8                9.0 +/-    1.59      22.6 +/-    1.59  0.140 / 0.390
G16     115.2          61.9               10.9 +/-    0.52      12.2 +/-    0.52  0.140 / 0.280
G22     186.9          47.4               11.1 +/-    0.96      14.5 +/-    0.96  0.050 / 0.060
G23     326.9          56.4                9.0 +/-    0.84      10.6 +/-    0.84  0.060 / 0.060
G26     61.4           47.9                8.9 +/-    0.62      11.5 +/-    0.62  0.050 / 0.070
G31     55.0           14.7                7.6 +/-    4.18      19.1 +/-    4.18  0.050 / 0.110