PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-10:28:00
G02     32.8           56.1                3.9 +/-    1.02       4.6 +/-    1.02  0.020 / 0.020
G05     143.6          59.6                5.7 +/-    0.61       6.5 +/-    0.61  0.020 / 0.020
G06     50.8           22.6                2.0 +/-    2.20       4.2 +/-    2.20  0.060 / 0.040
G12     209.1          71.8                5.2 +/-    0.35       5.4 +/-    0.35  0.040 / 0.030
G19     98.3           10.7                6.2 +/-    1.83      17.0 +/-    1.83  0.030 / 0.050
G20     199.5          20.7                3.3 +/-    2.14       7.2 +/-    2.14  0.030 / 0.030
G25     301.1          51.5                5.4 +/-    2.05       6.7 +/-    2.05  0.210 / 0.240
G29     306.9          28.8                3.5 +/-    0.85       6.2 +/-    0.85  0.160 / 0.210