PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-04:27:30
G05     50.1           13.1                3.1 +/-    1.69       8.2 +/-    1.69  0.230 / 0.300
G10     238.1          16.0                9.2 +/-    1.52      22.4 +/-    1.52  0.230 / 0.270
G13     70.9           35.2                7.0 +/-    1.40      11.0 +/-    1.40  0.050 / 0.060
G15     116.5          54.3                7.9 +/-    0.49       9.5 +/-    0.49  0.040 / 0.060
G16     314.3          11.5                3.7 +/-    9.30       9.9 +/-    9.30  0.070 / 0.120
G20     251.4          39.6                9.8 +/-    1.02      14.3 +/-    1.02  0.050 / 0.110
G21     318.0          50.2                7.2 +/-    0.66       9.1 +/-    0.66  0.060 / 0.190
G26     286.7          19.1                7.3 +/-    1.27      16.4 +/-    1.27  0.070 / 0.240
G29     153.5          64.5                8.0 +/-    0.62       8.8 +/-    0.62  0.030 / 0.050