PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-08:57:40
G08     290.3          23.3                5.3 +/-    0.68      10.8 +/-    0.68  0.060 / 0.090
G10     15.8           62.8                5.0 +/-    1.23       5.5 +/-    1.23  0.060 / 0.110
G14     231.9          49.6                7.1 +/-    2.81       9.0 +/-    2.81  0.030 / 0.030
G18     317.7          13.9                3.1 +/-    1.85       7.9 +/-    1.85  0.030 / 0.030
G20     69.3           50.6                5.0 +/-    0.59       6.2 +/-    0.59  0.030 / 0.030
G21     147.6          36.0                5.5 +/-    1.06       8.6 +/-    1.06  0.040 / 0.030
G24     52.9           23.4                3.4 +/-    2.23       6.8 +/-    2.23  0.130 / 0.090
G27     253.4          30.6                7.3 +/-    1.81      12.7 +/-    1.81  0.080 / 0.080
G32     245.8          64.0                7.5 +/-    0.35       8.2 +/-    0.35  0.130 / 0.150