PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/14-18:57:40
G02     221.8          64.2               14.9 +/-    1.27      16.4 +/-    1.27  0.060 / 0.110
G06     47.2           67.4               14.0 +/-    0.67      15.1 +/-    0.67  0.080 / 0.110
G12     321.1          44.4               12.9 +/-    0.80      17.5 +/-    0.80  0.030 / 0.030
G17     61.9           29.0               12.2 +/-    1.08      21.8 +/-    1.08  0.030 / 0.030
G19     42.8           47.8               12.3 +/-    1.35      16.0 +/-    1.35  0.030 / 0.060
G24     256.4          40.0               16.0 +/-    2.99      23.3 +/-    2.99  0.030 / 0.060