PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-06:42:50
G10     300.5          53.3                4.6 +/-    1.69       5.6 +/-    1.69  0.070 / 0.090
G14     210.1          13.4                2.5 +/-    2.27       6.6 +/-    2.27  0.060 / 0.070
G15     45.8           25.7                3.6 +/-    2.10       7.0 +/-    2.10  0.040 / 0.030
G20     356.1          65.2                4.7 +/-    0.95       5.1 +/-    0.95  0.030 / 0.030
G21     102.4          71.9                5.7 +/-    0.94       6.0 +/-    0.94  0.060 / 0.060
G24     95.3           26.9                5.2 +/-    0.95       9.7 +/-    0.95  0.050 / 0.030
G27     300.6          33.9                3.7 +/-    2.63       6.0 +/-    2.63  0.080 / 0.110
G32     211.7          28.9                7.0 +/-    1.71      12.6 +/-    1.71  0.080 / 0.090