PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-18:57:40
G07     49.3           67.8               12.0 +/-    0.96      12.9 +/-    0.96  0.040 / 0.030
G08     55.6           43.5               11.8 +/-    1.66      16.3 +/-    1.66  0.040 / 0.040
G09     179.7          44.4               16.1 +/-    0.50      21.9 +/-    0.50  0.070 / 0.060
G11     123.4          32.2               14.9 +/-    1.37      24.9 +/-    1.37  0.080 / 0.060
G18     107.2          13.4               15.3 +/-    2.31      39.6 +/-    2.31  0.210 / 0.260
G23     160.7          14.2                5.8 +/-    1.71      14.6 +/-    1.71  0.130 / 0.250
G27     39.0           14.1                8.3 +/-    3.35      21.2 +/-    3.35  0.130 / 0.310
G28     262.8          45.6               14.2 +/-    3.08      19.0 +/-    3.08  0.130 / 0.280
G30     327.1          56.4               10.4 +/-    0.69      12.2 +/-    0.69  0.120 / 0.350