PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-18:42:50
G01     117.4          19.2               14.1 +/-    1.64      31.6 +/-    1.64  0.040 / 0.100
G07     84.8           65.9               12.9 +/-    0.37      14.0 +/-    0.37  0.040 / 0.060
G08     45.0           32.4                9.2 +/-    1.37      15.4 +/-    1.37  0.030 / 0.030
G09     176.9          24.2               15.7 +/-    0.73      31.3 +/-    0.73  0.030 / 0.030
G11     105.7          40.7               13.1 +/-    0.63      18.8 +/-    0.63  0.230 / 0.270
G13     316.8          20.8               10.4 +/-    2.33      22.5 +/-    2.33  0.150 / 0.160
G17     203.3          23.3               17.3 +/-    1.68      35.2 +/-    1.68  0.100 / 0.200
G18     92.6           21.6               11.3 +/-    1.44      23.9 +/-    1.44  0.090 / 0.190
G28     297.0          58.3               12.0 +/-    0.98      13.8 +/-    0.98  0.050 / 0.050
G30     353.6          71.1               12.5 +/-    0.53      13.2 +/-    0.53  0.040 / 0.050