PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-14:27:30
G03     198.7          47.0               10.9 +/-    1.35      14.3 +/-    1.35  0.070 / 0.130
G07     266.1          26.1               10.5 +/-    2.67      20.1 +/-    2.67  0.070 / 0.100
G09     313.7          33.9                8.0 +/-    1.07      12.9 +/-    1.07  0.040 / 0.030
G16     81.1           64.7                8.9 +/-    1.19       9.7 +/-    1.19  0.040 / 0.030
G22     183.0          30.0               10.1 +/-    0.91      17.7 +/-    0.91  0.040 / 0.040
G23     339.3          67.5                9.1 +/-    0.52       9.7 +/-    0.52  0.040 / 0.040
G26     49.1           38.7                8.6 +/-    1.25      12.8 +/-    1.25  0.170 / 0.260
G27     129.5          15.5                9.1 +/-    2.28      22.3 +/-    2.28  0.200 / 0.350