PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-13:58:20
G03     224.6          68.3                6.6 +/-    0.62       7.0 +/-    0.62  0.040 / 0.040
G07     248.3          11.8                6.7 +/-    1.98      17.9 +/-    1.98  0.030 / 0.050
G09     302.4          16.4                4.3 +/-    2.52      10.3 +/-    2.52  0.060 / 0.340
G14     99.0           14.3                8.2 +/-    1.38      20.6 +/-    1.38  0.090 / 0.420
G16     134.9          56.8               10.9 +/-    0.72      12.8 +/-    0.72  0.050 / 0.070
G22     190.0          52.9                9.0 +/-    1.44      10.9 +/-    1.44  0.050 / 0.060
G23     318.7          48.6                5.9 +/-    1.08       7.6 +/-    1.08  0.140 / 0.300
G26     74.0           53.8                7.6 +/-    0.71       9.2 +/-    0.71  0.130 / 0.330
G31     51.7           20.7                6.4 +/-    0.97      13.8 +/-    0.97  0.040 / 0.040