PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-21:12:40
G07     319.3          53.3               12.0 +/-    0.76      14.6 +/-    0.76  0.330 / 0.270
G08     116.5          45.6               13.8 +/-    0.69      18.4 +/-    0.69  0.300 / 0.530
G09     261.8          83.2               14.7 +/-    0.70      14.8 +/-    0.70  0.130 / 0.250
G16     42.9           21.7                8.5 +/-    2.24      18.0 +/-    2.24  0.200 / 0.360
G23     150.0          58.3               13.8 +/-    0.70      15.9 +/-    0.70  0.030 / 0.060
G27     73.4           37.9               12.2 +/-    1.01      18.4 +/-    1.01  0.030 / 0.050
G28     227.3          15.3               15.2 +/-    7.24      37.6 +/-    7.24  0.030 / 0.020
G30     291.0          26.1               11.3 +/-    2.17      21.6 +/-    2.17  0.030 / 0.020