PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-11:43:10
G02     36.7           52.6                4.1 +/-    1.44       5.0 +/-    1.44  0.020 / 0.030
G05     136.9          63.4                5.6 +/-    0.62       6.2 +/-    0.62  0.020 / 0.020
G06     53.3           19.4                2.1 +/-    3.58       4.6 +/-    3.58  0.200 / 0.200
G12     201.1          66.9                4.5 +/-    0.25       4.8 +/-    0.25  0.210 / 0.210
G20     199.8          25.9                4.7 +/-    2.52       9.0 +/-    2.52  0.050 / 0.030
G25     294.0          54.7                2.9 +/-    2.07       3.5 +/-    2.07  0.030 / 0.040
G29     310.7          32.9                1.7 +/-    1.13       2.7 +/-    1.13  0.330 / 0.430