PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-20:58:00
G01     117.4          19.2               15.8 +/-    1.35      35.5 +/-    1.35  0.080 / 0.080
G07     84.8           65.9               13.2 +/-    0.38      14.4 +/-    0.38  0.170 / 0.120
G08     45.5           34.1               10.9 +/-    0.79      17.6 +/-    0.79  0.170 / 0.270
G09     177.3          24.7               16.7 +/-    1.87      32.9 +/-    1.87  0.280 / 0.220
G11     106.9          40.7               14.4 +/-    0.38      20.7 +/-    0.38  0.030 / 0.040
G13     316.9          20.6               10.4 +/-    1.77      22.7 +/-    1.77  0.070 / 0.030
G17     203.4          23.0               16.9 +/-    1.58      34.6 +/-    1.58  0.160 / 0.270
G18     92.8           21.6               12.4 +/-    2.30      26.2 +/-    2.30  0.280 / 0.290
G28     297.4          58.4               12.4 +/-    0.69      14.3 +/-    0.69  0.050 / 0.050
G30     357.1          71.8               13.8 +/-    0.66      14.5 +/-    0.66  0.150 / 0.070