PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-18:42:30
G07     31.0           69.5               13.8 +/-    0.63      14.6 +/-    0.63  0.030 / 0.040
G08     58.9           47.4               13.6 +/-    0.56      17.8 +/-    0.56  0.030 / 0.030
G09     179.5          43.6               16.5 +/-    0.84      22.7 +/-    0.84  0.060 / 0.060
G11     126.5          30.9               16.9 +/-    1.13      29.0 +/-    1.13  0.030 / 0.050
G18     110.2          13.2               15.5 +/-    2.26      40.2 +/-    2.26  0.140 / 0.100
G27     38.3           12.1                9.9 +/-    1.82      26.4 +/-    1.82  0.110 / 0.070
G28     267.1          49.5               15.6 +/-    4.18      19.7 +/-    4.18  0.160 / 0.460
G30     327.7          56.5               13.1 +/-    0.53      15.4 +/-    0.53  0.160 / 0.330