PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-18:28:00
G07     22.2           67.5               12.8 +/-    0.75      13.7 +/-    0.75  0.040 / 0.040
G08     67.7           49.2               13.2 +/-    0.83      16.8 +/-    0.83  0.050 / 0.040
G09     181.6          55.3               14.1 +/-    0.51      16.7 +/-    0.51  0.030 / 0.040
G11     132.1          25.8               15.2 +/-    3.01      29.2 +/-    3.01  0.030 / 0.030
G23     159.8          23.9               15.3 +/-    1.86      30.6 +/-    1.86  0.080 / 0.080
G27     43.2           21.7               10.7 +/-    1.77      22.6 +/-    1.77  0.080 / 0.120
G28     251.5          38.9               13.8 +/-    1.41      20.4 +/-    1.41  0.170 / 0.290
G30     317.6          48.8               12.5 +/-    0.82      15.9 +/-    0.82  0.140 / 0.210