PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-16:28:10
G03     185.9          11.0               10.7 +/-    1.70      29.2 +/-    1.70  0.050 / 0.070
G07     300.3          42.8                9.9 +/-    1.40      13.8 +/-    1.40  0.060 / 0.100
G08     137.1          35.4               12.5 +/-    0.67      19.7 +/-    0.67  0.030 / 0.060
G09     314.6          72.9                9.0 +/-    0.44       9.4 +/-    0.44  0.030 / 0.040
G16     41.7           27.9                5.5 +/-    1.30      10.1 +/-    1.30  0.080 / 0.080
G23     137.6          63.9               10.6 +/-    0.49      11.7 +/-    0.49  0.060 / 0.080
G27     86.1           36.7                8.8 +/-    1.19      13.5 +/-    1.19  0.080 / 0.140
G30     282.0          19.7                8.0 +/-    1.52      17.8 +/-    1.52  0.070 / 0.140