PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-04:57:50
G02     36.4           52.7                4.9 +/-    1.27       5.9 +/-    1.27  0.030 / 0.040
G05     132.7          63.7                6.7 +/-    0.45       7.3 +/-    0.45  0.030 / 0.040
G06     54.4           15.6                2.8 +/-    3.50       6.9 +/-    3.50  0.030 / 0.030
G12     199.8          67.0                5.6 +/-    0.52       6.0 +/-    0.52  0.030 / 0.040
G20     204.0          15.2                5.7 +/-    2.24      14.0 +/-    2.24  0.150 / 0.320
G25     295.9          53.5                4.0 +/-    3.62       4.8 +/-    3.62  0.300 / 0.370
G29     308.5          29.3                3.3 +/-    1.78       5.8 +/-    1.78  0.050 / 0.040