PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-01:57:30
G10     296.6          51.6               12.9 +/-    1.12      16.0 +/-    1.12  0.060 / 0.090
G15     46.6           31.0                9.8 +/-    0.90      16.8 +/-    0.90  0.070 / 0.080
G20     313.0          58.8               10.7 +/-    0.99      12.3 +/-    0.99  0.050 / 0.040
G21     92.2           75.3               13.3 +/-    0.35      13.7 +/-    0.35  0.040 / 0.040
G24     96.8           26.2               13.4 +/-    0.90      25.5 +/-    0.90  0.070 / 0.130
G27     301.1          33.9               11.5 +/-    1.09      18.7 +/-    1.09  0.070 / 0.160
G32     210.0          33.2               16.1 +/-    1.66      26.4 +/-    1.66  0.050 / 0.040