PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-06:57:40
G07     328.8          56.3                1.9 +/-    1.00       2.2 +/-    1.00  0.030 / 0.060
G08     103.9          50.1                6.1 +/-    0.50       7.7 +/-    0.50  0.030 / 0.060
G09     195.6          77.6                3.9 +/-    0.73       3.9 +/-    0.73  0.130 / 0.180
G11     147.5          10.2               -6.0 +/-   19.89     -16.6 +/-   19.89  0.090 / 0.230
G16     44.9           14.9                2.6 +/-    1.40       6.5 +/-    1.40  0.030 / 0.050
G23     154.3          48.4                7.1 +/-    1.53       9.1 +/-    1.53  0.030 / 0.050
G27     58.7           33.0                2.8 +/-    0.68       4.6 +/-    0.68  0.040 / 0.050
G28     234.2          26.5                5.5 +/-    2.49      10.3 +/-    2.49  0.050 / 0.040
G30     297.9          31.5                1.5 +/-    1.01       2.6 +/-    1.01  0.110 / 0.430