PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/19-08:58:00
G10     279.6          45.5                4.9 +/-    1.56       6.5 +/-    1.56  0.040 / 0.030
G15     50.3           39.1                3.5 +/-    1.10       5.2 +/-    1.10  0.040 / 0.040
G20     320.7          64.1                4.0 +/-    0.99       4.4 +/-    0.99  0.080 / 0.050
G21     52.7           75.9                4.0 +/-    1.32       4.1 +/-    1.32  0.060 / 0.060
G24     109.5          20.3                4.6 +/-    1.66      10.2 +/-    1.66  0.140 / 0.250
G27     313.9          25.0                2.6 +/-    1.31       5.1 +/-    1.31  0.140 / 0.220
G29     165.6          15.5                3.3 +/-    1.32       8.1 +/-    1.32  0.110 / 0.130
G32     207.1          14.9                3.1 +/-    1.34       7.8 +/-    1.34  0.180 / 0.110