PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-15:27:40
G03     200.7          45.9               12.9 +/-    0.66      17.2 +/-    0.66  0.050 / 0.050
G07     265.6          21.4               11.7 +/-    3.07      24.8 +/-    3.07  0.030 / 0.040
G09     315.1          36.8               11.3 +/-    0.93      17.4 +/-    0.93  0.040 / 0.050
G16     66.7           60.4               11.4 +/-    0.71      13.0 +/-    0.71  0.030 / 0.030
G22     181.1          26.7               10.8 +/-    1.45      20.4 +/-    1.45  0.410 / 0.420
G23     353.9          73.2               11.9 +/-    0.38      12.4 +/-    0.38  0.190 / 0.410
G26     46.1           32.7                8.3 +/-    1.21      13.7 +/-    1.21  0.290 / 0.140
G27     125.4          18.2               11.0 +/-    1.85      25.2 +/-    1.85  0.090 / 0.120