PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-07:42:30
G07     319.8          52.8                3.6 +/-    1.33       4.3 +/-    1.33  0.070 / 0.130
G08     112.2          47.7                6.9 +/-    0.60       9.0 +/-    0.60  0.110 / 0.160
G09     191.7          80.4                4.2 +/-    0.52       4.3 +/-    0.52  0.110 / 0.250
G16     44.1           13.8                1.7 +/-    1.29       4.4 +/-    1.29  0.080 / 0.240
G23     151.7          53.6                6.1 +/-    0.41       7.4 +/-    0.41  0.030 / 0.050
G27     67.3           36.5                3.7 +/-    0.61       5.6 +/-    0.61  0.030 / 0.060
G28     229.8          20.4                5.7 +/-    2.40      12.3 +/-    2.40  0.050 / 0.060
G30     293.1          27.2                2.7 +/-    2.14       5.0 +/-    2.14  0.040 / 0.070