PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-05:27:30
G10     245.7          23.6                7.7 +/-    1.59      15.5 +/-    1.59  0.040 / 0.050
G13     58.9           32.0                6.3 +/-    1.65      10.6 +/-    1.65  0.040 / 0.040
G15     96.2           57.3                8.0 +/-    0.29       9.3 +/-    0.29  0.110 / 0.110
G16     305.3          13.8                5.3 +/-    1.40      13.5 +/-    1.40  0.100 / 0.140
G20     262.7          47.1                9.0 +/-    4.03      11.7 +/-    4.03  0.070 / 0.130
G21     329.6          57.3                5.9 +/-    0.67       6.8 +/-    0.67  0.070 / 0.130
G26     276.6          17.1                6.5 +/-    1.68      15.4 +/-    1.68  0.040 / 0.050
G29     159.2          52.3                8.0 +/-    0.40       9.8 +/-    0.40  0.040 / 0.040