PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-18:12:30
G07     5.2            65.8               12.5 +/-    0.45      13.6 +/-    0.45  0.040 / 0.030
G08     78.5           51.5               13.3 +/-    0.72      16.4 +/-    0.72  0.030 / 0.030
G09     184.1          63.0               14.1 +/-    0.41      15.6 +/-    0.41  0.040 / 0.040
G11     137.2          21.2               15.1 +/-    1.45      32.3 +/-    1.45  0.030 / 0.040
G23     158.6          30.8               14.2 +/-    1.66      24.5 +/-    1.66  0.070 / 0.140
G27     47.4           26.6               11.2 +/-    3.30      21.1 +/-    3.30  0.110 / 0.150
G28     244.8          33.9               12.6 +/-    1.86      20.5 +/-    1.86  0.110 / 0.140
G30     311.6          43.8               11.8 +/-    0.96      16.2 +/-    0.96  0.140 / 0.180