PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-18:12:30
G07     326.7          56.4               12.4 +/-    0.70      14.6 +/-    0.70  0.040 / 0.050
G08     112.6          47.7               15.0 +/-    0.26      19.5 +/-    0.26  0.030 / 0.050
G09     236.7          82.5               14.7 +/-    0.61      14.8 +/-    0.61  0.210 / 0.280
G16     43.6           19.1                8.9 +/-    2.92      20.1 +/-    2.92  0.210 / 0.280
G23     151.7          53.0               15.2 +/-    0.92      18.5 +/-    0.92  0.030 / 0.020
G27     67.9           36.8               13.3 +/-    0.94      20.4 +/-    0.94  0.030 / 0.020
G28     229.4          17.7               17.0 +/-    3.08      39.6 +/-    3.08  0.060 / 0.050
G30     294.6          29.6               12.0 +/-    2.26      21.2 +/-    2.26  0.060 / 0.050