PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-22:57:40
G02     213.8          58.4               13.7 +/-    0.60      15.7 +/-    0.60  0.100 / 0.090
G06     64.0           75.8               12.0 +/-    0.35      12.3 +/-    0.35  0.090 / 0.100
G12     317.9          34.2                9.6 +/-    1.54      15.4 +/-    1.54  0.050 / 0.070
G17     53.2           36.8               10.8 +/-    1.09      16.6 +/-    1.09  0.090 / 0.090
G19     34.8           51.8               12.5 +/-    1.80      15.5 +/-    1.80  0.160 / 0.350
G24     268.6          42.1               13.4 +/-    2.75      18.8 +/-    2.75  0.160 / 0.310
G28     121.1          15.3               14.9 +/-    2.16      36.8 +/-    2.16  0.030 / 0.030