PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/15-20:58:00
G07     315.4          51.7               11.4 +/-    1.13      14.1 +/-    1.13  0.050 / 0.060
G08     120.5          43.7               11.7 +/-    0.52      16.0 +/-    0.52  0.050 / 0.070
G09     286.7          81.8               12.9 +/-    0.53      13.0 +/-    0.53  0.130 / 0.170
G16     42.4           24.5                7.9 +/-    2.03      15.6 +/-    2.03  0.260 / 0.180
G23     147.9          61.6               12.4 +/-    0.45      13.9 +/-    0.45  0.050 / 0.050
G27     77.5           38.1               10.0 +/-    0.66      15.1 +/-    0.66  0.050 / 0.040
G28     225.6          12.7                8.9 +/-   14.17      23.5 +/-   14.17  0.030 / 0.020
G30     288.6          24.2                9.8 +/-    1.56      19.5 +/-    1.56  0.030 / 0.030