PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-14:12:40
G01     121.3          15.9                9.1 +/-    1.72      22.2 +/-    1.72  0.120 / 0.610
G07     78.7           64.9                8.2 +/-    0.76       8.9 +/-    0.76  0.140 / 0.510
G08     45.8           32.3                7.5 +/-    0.94      12.5 +/-    0.94  0.030 / 0.050
G09     176.1          27.9               10.3 +/-    3.31      18.9 +/-    3.31  0.030 / 0.050
G11     107.2          37.1                8.9 +/-    1.70      13.6 +/-    1.70  0.100 / 0.190
G13     319.8          15.3                4.1 +/-    2.44      10.2 +/-    2.44  0.110 / 0.200
G17     200.3          23.8                9.1 +/-    1.38      18.3 +/-    1.38  0.110 / 0.120
G28     287.5          55.9                6.0 +/-    1.25       7.0 +/-    1.25  0.140 / 0.150
G30     338.0          63.9                7.3 +/-    1.12       8.0 +/-    1.12  0.180 / 0.210