PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-12:12:30
G02     39.8           49.7                3.5 +/-    1.32       4.5 +/-    1.32  0.030 / 0.020
G05     129.1          66.2                5.5 +/-    0.45       5.9 +/-    0.45  0.020 / 0.020
G06     55.5           16.2                3.0 +/-    2.69       7.1 +/-    2.69  0.030 / 0.030
G12     197.0          62.8                4.6 +/-    0.42       5.1 +/-    0.42  0.030 / 0.030
G20     200.3          29.8                6.2 +/-    2.13      10.9 +/-    2.13  0.080 / 0.170
G25     287.3          56.7                1.0 +/-    3.50       1.1 +/-    3.50  0.100 / 0.160
G29     313.5          36.0                2.5 +/-    1.00       3.8 +/-    1.00  0.040 / 0.040