PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-12:42:40
G10     250.1          25.7                4.9 +/-    1.82       9.5 +/-    1.82  0.120 / 0.300
G13     54.8           31.1                2.5 +/-    2.11       4.4 +/-    2.11  0.210 / 0.340
G15     84.8           56.5                4.1 +/-    0.68       4.8 +/-    0.68  0.040 / 0.040
G16     298.7          14.5                3.1 +/-    2.37       7.8 +/-    2.37  0.050 / 0.040
G18     271.0          58.0                5.6 +/-    1.32       6.5 +/-    1.32  0.040 / 0.050
G20     38.6           53.3                3.2 +/-    0.85       3.9 +/-    0.85  0.030 / 0.040
G21     338.1          62.2                3.2 +/-    0.97       3.6 +/-    0.97  0.080 / 0.110
G26     269.3          15.7                5.6 +/-    1.39      13.7 +/-    1.39  0.080 / 0.130
G29     163.4          47.9                4.8 +/-    0.86       6.2 +/-    0.86  0.110 / 0.150