PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-11:12:30
G02     40.5           49.0                5.3 +/-    1.43       6.8 +/-    1.43  0.030 / 0.030
G05     126.2          66.6                9.4 +/-    0.46      10.2 +/-    0.46  0.020 / 0.030
G06     55.8           16.1                3.4 +/-    2.46       8.3 +/-    2.46  0.080 / 0.140
G12     196.5          62.1                7.8 +/-    0.56       8.7 +/-    0.56  0.110 / 0.130
G20     200.7          29.9                5.4 +/-    1.42       9.5 +/-    1.42  0.040 / 0.040
G25     286.6          56.7                8.8 +/-    3.01      10.3 +/-    3.01  0.040 / 0.040
G29     313.6          35.9                4.2 +/-    1.17       6.6 +/-    1.17  0.170 / 0.220