PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-18:43:10
G01     117.0          19.5               13.8 +/-    1.14      30.7 +/-    1.14  0.040 / 0.080
G07     85.9           65.7               12.4 +/-    0.24      13.5 +/-    0.24  0.050 / 0.070
G08     44.8           32.0                9.3 +/-    0.68      15.7 +/-    0.68  0.020 / 0.050
G09     176.9          23.8               16.0 +/-    2.35      32.2 +/-    2.35  0.030 / 0.040
G11     105.1          40.9               14.1 +/-    1.14      20.2 +/-    1.14  0.130 / 0.220
G13     316.6          21.1                8.8 +/-    2.74      18.9 +/-    2.74  0.110 / 0.210
G17     203.4          23.8               16.1 +/-    1.46      32.3 +/-    1.46  0.050 / 0.050
G18     92.1           21.8               11.9 +/-    0.85      25.1 +/-    0.85  0.050 / 0.070
G28     297.9          58.4               11.2 +/-    0.76      12.8 +/-    0.76  0.060 / 0.070
G30     354.6          71.4               11.8 +/-    1.47      12.4 +/-    1.47  0.060 / 0.080