PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-16:42:30
G07     342.4          61.2               12.9 +/-    0.41      14.5 +/-    0.41  0.050 / 0.040
G08     91.4           53.7               13.9 +/-    0.85      16.8 +/-    0.85  0.050 / 0.040
G09     185.2          66.7               14.2 +/-    0.63      15.4 +/-    0.63  0.090 / 0.080
G11     142.3          17.1               12.3 +/-    2.27      29.0 +/-    2.27  0.090 / 0.100
G23     155.9          30.5               13.1 +/-    0.75      22.8 +/-    0.75  0.030 / 0.050
G27     49.2           27.7               10.3 +/-    2.43      18.9 +/-    2.43  0.030 / 0.040
G28     243.0          34.9               15.8 +/-    2.04      25.2 +/-    2.04  0.070 / 0.130
G30     307.9          40.2               12.7 +/-    1.54      18.4 +/-    1.54  0.140 / 0.120