PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-04:57:50
G10     243.4          20.0                7.9 +/-    2.45      17.4 +/-    2.45  0.080 / 0.300
G13     63.0           34.3                6.7 +/-    1.23      10.7 +/-    1.23  0.090 / 0.320
G15     104.7          57.1                7.6 +/-    0.69       8.8 +/-    0.69  0.040 / 0.050
G16     303.9          15.2                2.4 +/-    1.42       5.8 +/-    1.42  0.030 / 0.040
G20     282.0          66.8                7.4 +/-    0.44       7.9 +/-    0.44  0.030 / 0.040
G21     323.2          53.8                5.9 +/-    0.46       7.1 +/-    0.46  0.040 / 0.030
G26     275.2          18.8                4.2 +/-    1.10       9.6 +/-    1.10  0.040 / 0.040
G29     162.1          60.7                7.6 +/-    0.37       8.6 +/-    0.37  0.040 / 0.040