PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-07:27:50
G02     201.3          31.9                5.9 +/-    1.75       9.9 +/-    1.75  0.070 / 0.110
G06     173.8          60.4                7.2 +/-    0.58       8.1 +/-    0.58  0.070 / 0.120
G12     304.9          10.7               -6.2 +/-    7.51     -17.1 +/-    7.51  0.100 / 0.110
G17     32.7           52.0                5.4 +/-    1.29       6.6 +/-    1.29  0.030 / 0.030
G19     354.7          67.2                3.8 +/-    0.40       4.0 +/-    0.40  0.040 / 0.040
G24     303.5          34.8                3.5 +/-    1.67       5.6 +/-    1.67  0.040 / 0.030
G28     98.8           33.3                7.3 +/-    1.37      12.0 +/-    1.37  0.040 / 0.030