PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/26-08:12:30
G07     333.1          57.9                3.5 +/-    0.75       4.1 +/-    0.75  0.030 / 0.050
G08     99.4           50.8                6.6 +/-    0.54       8.2 +/-    0.54  0.040 / 0.040
G09     188.3          74.5                6.0 +/-    0.73       6.2 +/-    0.73  0.040 / 0.040
G11     145.5          11.7                5.3 +/-    2.05      14.2 +/-    2.05  0.030 / 0.040
G16     45.8           12.1                2.7 +/-    1.82       7.2 +/-    1.82  0.080 / 0.090
G23     155.3          45.7                7.3 +/-    0.92       9.7 +/-    0.92  0.080 / 0.080
G27     56.1           31.8                4.4 +/-    1.50       7.5 +/-    1.50  0.030 / 0.040
G28     236.0          28.5                7.8 +/-    1.21      14.2 +/-    1.21  0.050 / 0.030
G30     299.7          32.7                3.2 +/-    2.68       5.3 +/-    2.68  0.070 / 0.170