PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/09-19:43:00
G03     234.7          68.6                7.9 +/-    0.83       8.4 +/-    0.83  0.130 / 0.330
G09     302.4          16.2                6.9 +/-    1.55      16.6 +/-    1.55  0.090 / 0.330
G14     98.5           16.2                9.7 +/-    1.64      23.3 +/-    1.64  0.030 / 0.060
G16     131.0          58.0               11.9 +/-    0.60      13.7 +/-    0.60  0.040 / 0.060
G22     194.5          56.2               11.4 +/-    1.48      13.4 +/-    1.48  0.100 / 0.220
G23     319.1          49.0                7.7 +/-    0.70       9.9 +/-    0.70  0.110 / 0.200
G26     70.8           52.1                9.1 +/-    0.36      11.1 +/-    0.36  0.030 / 0.040
G31     51.7           20.3                7.2 +/-    1.09      15.8 +/-    1.09  0.030 / 0.030