PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-18:27:40
G01     124.9          12.7               15.5 +/-    2.27      40.7 +/-    2.27  0.040 / 0.030
G07     73.1           65.2               12.6 +/-    0.56      13.7 +/-    0.56  0.030 / 0.030
G08     48.7           37.3               10.9 +/-    1.24      16.6 +/-    1.24  0.030 / 0.040
G09     178.6          35.2               13.0 +/-    1.13      20.6 +/-    1.13  0.030 / 0.030
G11     114.5          37.1               14.2 +/-    1.60      21.7 +/-    1.60  0.100 / 0.100
G13     320.2          14.1               10.5 +/-    2.37      26.7 +/-    2.37  0.070 / 0.120
G17     199.5          17.3               12.4 +/-    2.21      29.2 +/-    2.21  0.100 / 0.230
G18     99.5           17.5               13.5 +/-    1.58      31.5 +/-    1.58  0.100 / 0.290
G28     274.2          50.6               14.0 +/-    3.53      17.6 +/-    3.53  0.100 / 0.430
G30     337.8          63.7               12.7 +/-    0.66      14.0 +/-    0.66  0.090 / 0.440