PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-12:42:50
G02     60.7           31.0                3.3 +/-    0.82       5.7 +/-    0.82  0.030 / 0.040
G05     58.7           61.5                2.5 +/-    0.85       2.8 +/-    0.85  0.020 / 0.030
G12     186.4          33.9                3.2 +/-    2.10       5.2 +/-    2.10  0.150 / 0.300
G13     129.4          15.1                5.1 +/-    3.53      12.7 +/-    3.53  0.090 / 0.310
G15     162.6          12.6                3.8 +/-    1.74      10.0 +/-    1.74  0.060 / 0.100
G20     209.2          57.2                4.8 +/-    1.29       5.6 +/-    1.29  0.040 / 0.080
G21     273.2          22.1                1.8 +/-    1.58       3.9 +/-    1.58  0.050 / 0.060
G25     236.6          51.8                3.7 +/-    1.82       4.6 +/-    1.82  0.040 / 0.060
G29     331.9          58.4                0.2 +/-    0.51       0.3 +/-    0.51  0.050 / 0.050