PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/15-06:28:00
G07     355.6          64.6                4.6 +/-    0.87       5.0 +/-    0.87  0.070 / 0.090
G08     75.1           50.6                7.6 +/-    1.23       9.5 +/-    1.23  0.060 / 0.090
G09     175.3          55.6                8.6 +/-    0.88      10.2 +/-    0.88  0.030 / 0.030
G11     136.4          21.5                6.5 +/-    1.43      13.9 +/-    1.43  0.030 / 0.040
G23     159.3          31.0                7.2 +/-    1.12      12.3 +/-    1.12  0.070 / 0.120
G27     46.6           25.8                4.8 +/-    0.46       9.2 +/-    0.46  0.060 / 0.090
G28     247.1          37.4                7.9 +/-    2.52      12.1 +/-    2.52  0.060 / 0.120
G30     310.3          41.8                4.3 +/-    1.94       6.1 +/-    1.94  0.060 / 0.120