PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-04:13:00
G05     47.8           18.5                2.9 +/-    0.84       6.6 +/-    0.84  0.060 / 0.070
G10     233.8          10.9               -2.9 +/-   37.49      -7.9 +/-   37.49  0.040 / 0.060
G13     79.5           35.7                5.6 +/-    1.43       8.8 +/-    1.43  0.120 / 0.320
G15     127.2          50.3                8.0 +/-    0.32      10.0 +/-    0.32  0.130 / 0.390
G20     245.3          34.5               10.8 +/-    1.27      17.2 +/-    1.27  0.210 / 0.240
G21     311.5          45.8                6.1 +/-    0.94       8.2 +/-    0.94  0.150 / 0.270
G25     200.6          13.7                8.6 +/-    3.76      22.0 +/-    3.76  0.050 / 0.120
G26     293.6          19.4                7.1 +/-    0.93      15.8 +/-    0.93  0.050 / 0.120
G29     146.9          72.1                7.2 +/-    1.15       7.5 +/-    1.15  0.070 / 0.120