PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-04:58:00
G10     245.2          23.2                6.7 +/-    1.51      13.7 +/-    1.51  0.080 / 0.110
G13     59.5           32.3                5.1 +/-    1.14       8.5 +/-    1.14  0.090 / 0.110
G15     97.4           57.2                7.3 +/-    0.39       8.4 +/-    0.39  0.060 / 0.050
G16     305.5          13.8                3.4 +/-    1.87       8.8 +/-    1.87  0.040 / 0.040
G20     262.0          46.7                7.7 +/-    3.56      10.1 +/-    3.56  0.060 / 0.110
G21     328.6          56.7                4.8 +/-    0.36       5.6 +/-    0.36  0.060 / 0.140
G26     277.0          17.3                5.7 +/-    1.94      13.4 +/-    1.94  0.040 / 0.050
G29     159.1          53.4                7.1 +/-    0.49       8.6 +/-    0.49  0.040 / 0.050