PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-08:57:50
G10     309.3          55.2                4.1 +/-    1.73       4.8 +/-    1.73  0.310 / 0.390
G14     213.2          16.0                5.2 +/-    1.71      12.5 +/-    1.71  0.380 / 0.230
G15     45.5           20.4                3.7 +/-    2.23       8.1 +/-    2.23  0.060 / 0.040
G20     64.8           36.7                5.6 +/-    0.71       8.5 +/-    0.71  0.060 / 0.040
G21     116.9          68.1                7.0 +/-    0.81       7.5 +/-    0.81  0.030 / 0.040
G24     88.8           29.0                6.1 +/-    1.24      10.8 +/-    1.24  0.030 / 0.030
G27     290.4          37.1                7.1 +/-    2.99      10.9 +/-    2.99  0.080 / 0.060
G32     214.3          41.4                5.4 +/-    0.91       7.7 +/-    0.91  0.080 / 0.060