PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-04:57:30
G05     50.3           12.6                2.0 +/-    2.51       5.2 +/-    2.51  0.040 / 0.050
G10     238.5          16.4                5.9 +/-    2.21      14.1 +/-    2.21  0.070 / 0.050
G13     70.2           35.1                4.3 +/-    1.23       6.8 +/-    1.23  0.120 / 0.260
G15     115.5          54.6                6.8 +/-    0.68       8.2 +/-    0.68  0.130 / 0.180
G20     252.0          40.1                7.0 +/-    1.71      10.1 +/-    1.71  0.060 / 0.250
G21     318.9          50.8                5.4 +/-    0.75       6.7 +/-    0.75  0.250 / 0.150
G26     286.4          19.0                5.3 +/-    0.74      12.0 +/-    0.74  0.050 / 0.090
G29     153.8          63.5                5.8 +/-    0.25       6.3 +/-    0.25  0.060 / 0.110