PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-11:28:00
G02     242.7          77.2                7.2 +/-    0.50       7.4 +/-    0.50  0.150 / 0.210
G05     172.7          15.5                5.3 +/-    2.61      13.1 +/-    2.61  0.230 / 0.270
G06     40.0           62.7                5.9 +/-    0.53       6.5 +/-    0.53  0.110 / 0.090
G12     321.3          50.7                5.8 +/-    0.38       7.3 +/-    0.38  0.110 / 0.070
G17     72.2           20.9                5.0 +/-    1.58      10.8 +/-    1.58  0.110 / 0.130
G19     58.7           37.3                5.8 +/-    0.75       8.8 +/-    0.75  0.080 / 0.110
G24     246.8          34.9                6.9 +/-    2.03      11.0 +/-    2.03  0.040 / 0.040
G25     316.8          13.3                1.6 +/-    3.26       4.1 +/-    3.26  0.030 / 0.040