PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-15:28:10
G01     312.7          28.2                7.2 +/-    1.56      13.1 +/-    1.56  0.120 / 0.230
G10     97.7           45.5                8.6 +/-    0.81      11.5 +/-    0.81  0.150 / 0.250
G11     292.8          25.9                6.5 +/-    2.27      12.5 +/-    2.27  0.160 / 0.220
G14     333.4          69.8                8.1 +/-    0.65       8.6 +/-    0.65  0.160 / 0.290
G22     307.2          21.6                7.9 +/-    1.51      16.6 +/-    1.51  0.030 / 0.040
G25     90.0           14.2                9.0 +/-    1.54      22.8 +/-    1.54  0.040 / 0.040
G31     170.7          57.5               11.1 +/-    0.33      12.9 +/-    0.33  0.040 / 0.040
G32     28.8           57.2                7.5 +/-    1.22       8.8 +/-    1.22  0.030 / 0.040