PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/12-19:13:10
G07     315.4          51.9               13.0 +/-    1.14      16.0 +/-    1.14  0.040 / 0.050
G08     122.1          43.1               15.9 +/-    0.88      22.1 +/-    0.88  0.040 / 0.050
G09     293.2          80.6               14.3 +/-    0.30      14.4 +/-    0.30  0.030 / 0.030
G16     42.2           26.6                8.8 +/-    2.66      16.7 +/-    2.66  0.030 / 0.030
G23     147.1          61.8               14.0 +/-    0.41      15.6 +/-    0.41  0.060 / 0.060
G27     78.1           38.0               12.2 +/-    1.53      18.4 +/-    1.53  0.050 / 0.060
G28     225.2          11.6               -2.7 +/-   20.39      -7.3 +/-   20.39  0.260 / 0.440
G30     288.3          24.3               12.4 +/-    1.80      24.7 +/-    1.80  0.050 / 0.070