PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-19:42:40
G03     206.1          54.2               13.9 +/-    0.94      16.8 +/-    0.94  0.040 / 0.070
G07     258.7          16.3               13.8 +/-    4.17      33.3 +/-    4.17  0.060 / 0.070
G09     311.1          28.9               10.8 +/-    1.12      19.3 +/-    1.12  0.050 / 0.040
G16     90.9           65.0               14.3 +/-    0.83      15.6 +/-    0.83  0.050 / 0.030
G22     186.5          38.5               14.5 +/-    1.18      21.6 +/-    1.18  0.140 / 0.260
G23     334.2          63.0               13.2 +/-    0.53      14.6 +/-    0.53  0.150 / 0.230
G26     51.5           41.2               10.5 +/-    0.60      15.0 +/-    0.60  0.050 / 0.030
G27     131.6          12.5               15.0 +/-    2.71      39.7 +/-    2.71  0.050 / 0.040