PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-15:12:40
G03     193.9          37.2               12.7 +/-    0.95      19.4 +/-    0.95  0.070 / 0.110
G07     274.3          31.4               12.8 +/-    1.10      21.9 +/-    1.10  0.060 / 0.100
G08     153.6          12.0               10.2 +/-    7.76      27.3 +/-    7.76  0.040 / 0.030
G09     317.3          42.1               10.9 +/-    0.56      15.3 +/-    0.56  0.040 / 0.030
G16     61.7           60.0               12.1 +/-    1.10      13.8 +/-    1.10  0.070 / 0.130
G22     180.4          20.8               12.1 +/-    3.09      26.2 +/-    3.09  0.080 / 0.110
G23     353.8          75.5               10.9 +/-    0.34      11.2 +/-    0.34  0.070 / 0.050
G26     45.3           31.0                9.8 +/-    1.31      16.7 +/-    1.31  0.060 / 0.060
G27     122.1          21.8               10.7 +/-    1.38      22.6 +/-    1.38  0.140 / 0.180