PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-17:42:50
G07     44.2           67.8               11.2 +/-    0.58      12.0 +/-    0.58  0.150 / 0.140
G08     58.5           45.5               11.6 +/-    0.60      15.5 +/-    0.60  0.150 / 0.140
G09     180.2          47.2               13.5 +/-    0.65      17.7 +/-    0.65  0.030 / 0.040
G11     125.9          30.7               13.8 +/-    1.12      23.9 +/-    1.12  0.030 / 0.030
G18     109.6          12.1               12.8 +/-    1.71      34.0 +/-    1.71  0.030 / 0.050
G23     160.3          16.0               13.8 +/-    1.90      33.5 +/-    1.90  0.040 / 0.050
G27     39.8           15.8                8.6 +/-    3.51      20.9 +/-    3.51  0.160 / 0.250
G28     259.6          43.8               14.4 +/-    2.80      19.7 +/-    2.80  0.120 / 0.350
G30     325.2          55.0               10.8 +/-    0.48      12.9 +/-    0.48  0.150 / 0.340