PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-16:57:40
G03     185.6          10.7               14.0 +/-    1.29      38.5 +/-    1.29  0.050 / 0.120
G07     300.5          42.9               12.5 +/-    1.26      17.4 +/-    1.26  0.050 / 0.090
G08     137.4          35.4               13.8 +/-    0.57      21.7 +/-    0.57  0.040 / 0.050
G09     314.4          72.9               12.5 +/-    0.58      13.1 +/-    0.58  0.030 / 0.050
G16     41.7           27.9                7.8 +/-    1.00      14.3 +/-    1.00  0.070 / 0.110
G23     137.8          64.2               13.2 +/-    0.67      14.5 +/-    0.67  0.090 / 0.150
G27     85.8           36.7               10.8 +/-    1.05      16.7 +/-    1.05  0.050 / 0.070
G30     282.2          20.0               10.4 +/-    1.83      23.0 +/-    1.83  0.050 / 0.080