PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-17:57:40
G07     26.4           67.7               11.4 +/-    0.79      12.3 +/-    0.79  0.030 / 0.030
G08     66.2           48.8               11.6 +/-    0.98      14.9 +/-    0.98  0.030 / 0.030
G09     181.4          54.0               14.1 +/-    0.42      16.9 +/-    0.42  0.100 / 0.160
G11     131.1          26.6               12.8 +/-    3.59      24.1 +/-    3.59  0.110 / 0.200
G23     159.8          22.4               14.5 +/-    2.84      30.2 +/-    2.84  0.100 / 0.340
G27     42.5           20.7               10.6 +/-    2.51      22.9 +/-    2.51  0.200 / 0.300
G28     252.7          39.6               13.0 +/-    1.63      19.0 +/-    1.63  0.050 / 0.040
G30     319.0          50.0               10.6 +/-    0.55      13.4 +/-    0.55  0.040 / 0.040