PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/04-18:43:00
G01     122.0          15.8               15.1 +/-    1.74      36.8 +/-    1.74  0.050 / 0.080
G07     70.3           68.3               11.6 +/-    0.95      12.4 +/-    0.95  0.030 / 0.070
G08     47.7           37.3                9.6 +/-    0.66      14.6 +/-    0.66  0.100 / 0.220
G09     177.7          29.8               12.4 +/-    2.79      21.8 +/-    2.79  0.100 / 0.260
G11     112.7          38.4               14.8 +/-    0.62      22.1 +/-    0.62  0.030 / 0.040
G13     319.3          16.5               10.5 +/-    1.23      25.2 +/-    1.23  0.040 / 0.040
G17     202.2          17.7               17.2 +/-    1.02      40.1 +/-    1.02  0.050 / 0.070
G18     98.2           19.5               13.5 +/-    1.48      30.1 +/-    1.48  0.040 / 0.070
G28     287.1          56.1               12.9 +/-    0.56      15.2 +/-    0.56  0.050 / 0.100
G30     343.7          66.7               10.3 +/-    0.58      11.2 +/-    0.58  0.040 / 0.110