PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-07:58:10
G07     326.4          55.4                4.5 +/-    0.87       5.3 +/-    0.87  0.040 / 0.050
G08     106.8          49.3                8.1 +/-    0.50      10.3 +/-    0.50  0.040 / 0.050
G09     198.2          79.2                7.9 +/-    0.49       8.0 +/-    0.49  0.120 / 0.120
G16     44.4           15.9                3.6 +/-    2.07       8.9 +/-    2.07  0.090 / 0.090
G23     153.4          50.6               10.0 +/-    1.06      12.5 +/-    1.06  0.030 / 0.040
G27     60.8           33.8                6.3 +/-    1.61      10.2 +/-    1.61  0.040 / 0.040
G28     232.7          24.8                9.0 +/-    4.44      17.6 +/-    4.44  0.180 / 0.290
G30     296.1          29.8                6.2 +/-    1.65      10.9 +/-    1.65  0.180 / 0.240