PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-19:57:50
G01     121.5          16.2               13.3 +/-    1.66      32.2 +/-    1.66  0.050 / 0.020
G07     72.0           68.1               12.6 +/-    0.33      13.5 +/-    0.33  0.060 / 0.040
G08     47.8           37.7               10.7 +/-    0.90      16.1 +/-    0.90  0.160 / 0.110
G09     177.9          29.5               14.7 +/-    1.97      26.0 +/-    1.97  0.170 / 0.160
G11     112.6          38.6               14.1 +/-    0.74      21.0 +/-    0.74  0.120 / 0.190
G13     319.1          16.8               10.3 +/-    1.80      24.5 +/-    1.80  0.110 / 0.210
G17     202.5          17.5               17.0 +/-    1.67      39.8 +/-    1.67  0.030 / 0.010
G18     97.7           19.7               11.8 +/-    1.77      26.0 +/-    1.77  0.030 / 0.010
G28     288.4          56.5               12.4 +/-    1.61      14.6 +/-    1.61  0.040 / 0.020
G30     346.1          67.7               11.6 +/-    0.36      12.4 +/-    0.36  0.030 / 0.010