PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-05:43:00
G10     295.9          51.9               -0.0 +/-    2.18      -0.0 +/-    2.18  0.050 / 0.090
G15     46.2           28.4                1.4 +/-    1.22       2.6 +/-    1.22  0.060 / 0.080
G20     348.6          65.3               -0.2 +/-    0.39      -0.3 +/-    0.39  0.040 / 0.030
G21     92.1           74.2                0.9 +/-    0.56       0.9 +/-    0.56  0.040 / 0.030
G24     98.9           25.8                3.8 +/-    3.00       7.4 +/-    3.00  0.070 / 0.070
G27     303.7          32.6               -0.5 +/-    1.51      -0.9 +/-    1.51  0.060 / 0.050
G32     210.4          26.5                5.0 +/-    2.59       9.5 +/-    2.59  0.080 / 0.140