PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/16-21:42:50
G07     350.1          63.2               10.0 +/-    0.46      11.1 +/-    0.46  0.070 / 0.160
G08     85.4           51.5                9.6 +/-    0.72      11.9 +/-    0.72  0.080 / 0.180
G09     185.1          67.6               10.0 +/-    0.44      10.8 +/-    0.44  0.100 / 0.090
G11     140.4          17.9               11.7 +/-    1.16      27.1 +/-    1.16  0.110 / 0.070
G23     158.0          37.4               10.3 +/-    1.14      15.6 +/-    1.14  0.040 / 0.040
G27     51.8           30.4                8.2 +/-    0.96      14.3 +/-    0.96  0.040 / 0.040
G28     240.8          30.9               12.1 +/-    1.73      20.7 +/-    1.73  0.030 / 0.030
G30     306.3          38.8                9.6 +/-    1.43      14.2 +/-    1.43  0.030 / 0.030