PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-11:43:00
G10     242.0          18.2                4.0 +/-    1.85       9.3 +/-    1.85  0.040 / 0.050
G13     65.9           35.4                2.9 +/-    0.62       4.6 +/-    0.62  0.040 / 0.050
G15     105.9          56.2                6.7 +/-    0.51       7.9 +/-    0.51  0.040 / 0.070
G16     308.3          13.6                3.4 +/-    2.30       8.9 +/-    2.30  0.030 / 0.060
G20     29.0           63.0                4.5 +/-    0.50       5.0 +/-    0.50  0.100 / 0.280
G21     324.6          55.0                3.0 +/-    1.10       3.5 +/-    1.10  0.100 / 0.230
G26     279.2          18.9                5.1 +/-    1.19      11.5 +/-    1.19  0.130 / 0.250
G29     159.6          60.1                7.8 +/-    0.84       8.8 +/-    0.84  0.100 / 0.250