PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-18:28:00
G07     7.5            67.1               12.0 +/-    0.66      13.0 +/-    0.66  0.030 / 0.060
G08     71.0           52.1               12.2 +/-    0.39      15.0 +/-    0.39  0.040 / 0.060
G09     181.0          53.2               13.1 +/-    3.25      15.9 +/-    3.25  0.100 / 0.320
G11     133.9          25.2               13.4 +/-    1.09      26.1 +/-    1.09  0.070 / 0.300
G23     158.1          17.8               11.3 +/-    1.82      26.3 +/-    1.82  0.040 / 0.040
G27     41.5           18.8                9.6 +/-    0.99      21.7 +/-    0.99  0.030 / 0.050
G28     256.0          44.0               11.8 +/-    1.69      16.1 +/-    1.69  0.090 / 0.210
G30     319.2          49.8               11.7 +/-    0.71      14.8 +/-    0.71  0.090 / 0.210