PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-21:12:30
G07     316.1          50.7               10.3 +/-    0.92      12.9 +/-    0.92  0.110 / 0.280
G08     122.0          46.1               16.2 +/-    0.86      21.4 +/-    0.86  0.120 / 0.290
G09     258.0          82.6               10.7 +/-    0.77      10.7 +/-    0.77  0.040 / 0.060
G16     43.4           17.4                8.0 +/-    1.07      18.7 +/-    1.07  0.030 / 0.050
G23     149.4          52.8               13.5 +/-    0.76      16.5 +/-    0.76  0.080 / 0.210
G27     67.7           35.9               11.0 +/-    0.57      17.1 +/-    0.57  0.070 / 0.210
G28     228.9          20.2               15.7 +/-    3.89      34.5 +/-    3.89  0.040 / 0.080
G30     294.2          30.4               11.2 +/-    1.12      19.4 +/-    1.12  0.050 / 0.080