PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-21:42:30
G03     185.6          11.0               10.0 +/-    3.16      27.4 +/-    3.16  0.050 / 0.090
G07     300.1          42.7                8.1 +/-    2.36      11.2 +/-    2.36  0.050 / 0.070
G08     136.1          35.5               10.3 +/-    0.59      16.2 +/-    0.59  0.080 / 0.120
G09     315.2          71.6                8.0 +/-    0.44       8.3 +/-    0.44  0.130 / 0.110
G16     41.6           30.6                7.7 +/-    1.14      13.4 +/-    1.14  0.050 / 0.070
G23     137.3          68.7                9.4 +/-    0.57      10.0 +/-    0.57  0.050 / 0.070
G27     86.1           36.5                8.5 +/-    1.16      13.2 +/-    1.16  0.030 / 0.030