PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-09:43:10
G02     12.4           71.1                4.5 +/-    0.48       4.7 +/-    0.48  0.040 / 0.050
G05     160.0          42.0                7.8 +/-    0.62      11.0 +/-    0.62  0.040 / 0.050
G06     42.8           37.5                2.8 +/-    1.05       4.2 +/-    1.05  0.030 / 0.020
G12     291.0          76.7                5.2 +/-    0.79       5.3 +/-    0.79  0.040 / 0.020
G19     83.4           21.4                3.3 +/-    2.50       7.0 +/-    2.50  0.070 / 0.090
G24     223.3          17.2                4.0 +/-    1.85       9.4 +/-    1.85  0.060 / 0.060
G25     315.1          36.5                5.3 +/-    0.57       8.2 +/-    0.57  0.040 / 0.030
G29     293.8          16.6                6.4 +/-    1.70      15.3 +/-    1.70  0.070 / 0.050