PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/19-07:42:50
G10     245.6          23.4                4.9 +/-    1.38      10.0 +/-    1.38  0.040 / 0.040
G13     59.1           32.2                3.7 +/-    1.45       6.3 +/-    1.45  0.030 / 0.040
G15     96.9           57.4                4.7 +/-    0.74       5.5 +/-    0.74  0.100 / 0.090
G16     306.9          13.0                2.1 +/-    3.08       5.6 +/-    3.08  0.080 / 0.120
G20     262.6          47.1                5.3 +/-    3.95       6.9 +/-    3.95  0.130 / 0.310
G21     331.5          58.4                3.5 +/-    0.54       4.1 +/-    0.54  0.100 / 0.310
G26     278.1          16.9                5.0 +/-    1.93      11.9 +/-    1.93  0.070 / 0.110
G29     158.6          50.9                5.5 +/-    0.78       6.9 +/-    0.78  0.070 / 0.110