PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-17:58:10
G07     338.0          59.7               12.5 +/-    0.71      14.2 +/-    0.71  0.030 / 0.050
G08     98.1           53.7               13.5 +/-    0.58      16.3 +/-    0.58  0.040 / 0.060
G09     188.3          70.0               13.0 +/-    1.08      13.7 +/-    1.08  0.050 / 0.120
G11     144.6          15.2               16.2 +/-    2.48      40.1 +/-    2.48  0.050 / 0.100
G23     155.1          33.0               14.6 +/-    1.37      24.0 +/-    1.37  0.080 / 0.180
G27     51.2           29.2               10.2 +/-    0.88      18.2 +/-    0.88  0.070 / 0.140
G28     240.7          32.9               14.4 +/-    1.61      23.7 +/-    1.61  0.030 / 0.050
G30     306.1          39.0               10.8 +/-    1.02      15.9 +/-    1.02  0.030 / 0.120