PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-07:27:50
G07     310.6          48.6                7.5 +/-    1.00       9.7 +/-    1.00  0.030 / 0.040
G08     123.5          42.3               11.6 +/-    1.06      16.2 +/-    1.06  0.040 / 0.040
G09     292.3          82.1                9.3 +/-    0.35       9.4 +/-    0.35  0.050 / 0.050
G16     41.9           26.5                4.0 +/-    2.75       7.6 +/-    2.75  0.040 / 0.050
G23     145.8          64.0                9.2 +/-    0.49      10.1 +/-    0.49  0.120 / 0.220
G27     75.7           36.6                7.5 +/-    1.05      11.5 +/-    1.05  0.140 / 0.120
G28     225.1          14.5                7.1 +/-    5.35      17.9 +/-    5.35  0.060 / 0.060
G30     286.4          22.1                8.2 +/-    1.93      17.2 +/-    1.93  0.040 / 0.050