PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-07:27:40
G02     33.0           55.9                2.5 +/-    1.10       2.9 +/-    1.10  0.030 / 0.040
G05     141.5          60.1                5.5 +/-    0.32       6.2 +/-    0.32  0.030 / 0.040
G06     51.6           20.4                1.0 +/-    2.51       2.3 +/-    2.51  0.160 / 0.170
G12     208.4          71.7                4.6 +/-    0.31       4.8 +/-    0.31  0.210 / 0.250
G19     98.1           11.2                5.4 +/-    1.75      14.6 +/-    1.75  0.170 / 0.380
G20     200.4          19.0                4.1 +/-    1.40       9.2 +/-    1.40  0.190 / 0.320
G25     301.6          50.9                3.0 +/-    1.48       3.7 +/-    1.48  0.030 / 0.030
G29     306.1          27.2                3.0 +/-    1.80       5.5 +/-    1.80  0.030 / 0.030