PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-16:57:50
G07     49.4           67.6               10.0 +/-    0.96      10.8 +/-    0.96  0.150 / 0.120
G08     56.8           44.6               10.9 +/-    0.95      14.8 +/-    0.95  0.160 / 0.160
G09     180.0          45.2               12.0 +/-    1.01      16.1 +/-    1.01  0.030 / 0.030
G11     124.3          31.8               10.0 +/-    1.15      16.9 +/-    1.15  0.030 / 0.040
G18     108.2          13.1               11.1 +/-    3.11      29.0 +/-    3.11  0.040 / 0.040
G23     160.2          13.8               10.3 +/-    1.21      26.5 +/-    1.21  0.040 / 0.040
G27     39.1           14.2                7.8 +/-    3.06      19.7 +/-    3.06  0.120 / 0.300
G28     261.7          44.8               10.7 +/-    3.15      14.5 +/-    3.15  0.100 / 0.330
G30     327.7          56.9                9.2 +/-    0.63      10.8 +/-    0.63  0.180 / 0.170