PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-11:28:10
G05     49.2           15.6                3.1 +/-    0.60       7.6 +/-    0.60  0.170 / 0.440
G10     236.5          12.2                4.3 +/-    1.50      11.5 +/-    1.50  0.120 / 0.420
G13     76.1           37.0                4.7 +/-    0.75       7.2 +/-    0.75  0.120 / 0.190
G15     120.5          52.6                7.4 +/-    0.66       9.0 +/-    0.66  0.110 / 0.260
G16     315.5          11.3               -2.3 +/-    2.55      -6.3 +/-    2.55  0.200 / 0.280
G20     19.6           70.4                4.7 +/-    0.76       5.0 +/-    0.76  0.300 / 0.400
G21     316.1          49.7                3.6 +/-    1.02       4.6 +/-    1.02  0.050 / 0.070
G25     199.7          10.6                5.0 +/-    2.15      13.7 +/-    2.15  0.040 / 0.050
G26     287.6          20.2                4.4 +/-    1.94       9.7 +/-    1.94  0.040 / 0.030
G29     154.6          69.4                7.1 +/-    1.08       7.5 +/-    1.08  0.030 / 0.030