PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-07:57:30
G08     299.5          22.4                4.6 +/-    1.66       9.5 +/-    1.66  0.040 / 0.070
G10     356.9          62.5                3.8 +/-    0.71       4.3 +/-    0.71  0.050 / 0.070
G14     224.5          41.6                8.7 +/-    1.59      12.3 +/-    1.59  0.080 / 0.100
G20     56.7           55.3                5.3 +/-    0.66       6.4 +/-    0.66  0.070 / 0.100
G21     143.0          45.0                7.6 +/-    1.39      10.3 +/-    1.39  0.030 / 0.030
G24     61.1           27.2                4.2 +/-    0.29       7.9 +/-    0.29  0.030 / 0.030
G27     263.0          34.6                7.9 +/-    0.82      12.6 +/-    0.82  0.060 / 0.120
G32     233.6          57.8                8.5 +/-    1.15       9.8 +/-    1.15  0.070 / 0.110