PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-22:42:40
G02     202.7          34.6               15.6 +/-    1.00      24.9 +/-    1.00  0.090 / 0.080
G06     166.5          66.2               13.4 +/-    0.45      14.5 +/-    0.45  0.090 / 0.110
G12     306.0          12.5                9.9 +/-    2.82      26.2 +/-    2.82  0.210 / 0.300
G17     36.0           49.0               10.6 +/-    1.41      13.5 +/-    1.41  0.130 / 0.260
G19     0.2            65.6                9.5 +/-    0.86      10.3 +/-    0.86  0.050 / 0.040
G24     297.3          38.6               10.6 +/-    2.57      15.8 +/-    2.57  0.040 / 0.040
G28     99.5           35.3               13.1 +/-    1.01      20.6 +/-    1.01  0.030 / 0.030