PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-15:57:50
G03     186.9          17.6               11.9 +/-    3.46      27.7 +/-    3.46  0.030 / 0.030
G07     295.0          43.0               11.9 +/-    0.84      16.6 +/-    0.84  0.030 / 0.040
G08     140.5          28.4               15.1 +/-    1.17      27.3 +/-    1.17  0.040 / 0.080
G09     320.2          61.9               13.3 +/-    1.19      14.9 +/-    1.19  0.040 / 0.090
G16     43.7           41.9               11.8 +/-    0.78      16.6 +/-    0.78  0.120 / 0.240
G23     115.4          79.2               14.4 +/-    0.52      14.7 +/-    0.52  0.140 / 0.200
G26     43.9           13.5               10.1 +/-    1.05      26.1 +/-    1.05  0.040 / 0.040
G27     101.4          33.7               14.5 +/-    0.92      23.6 +/-    0.92  0.030 / 0.040
G30     274.6          14.2               13.3 +/-    1.03      33.8 +/-    1.03  0.050 / 0.080