PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/15-07:28:00
G05     48.7           16.4                1.4 +/-    1.50       3.4 +/-    1.50  0.040 / 0.060
G10     235.7          12.9                2.6 +/-   21.24       6.8 +/-   21.24  0.050 / 0.060
G13     75.8           35.8                6.8 +/-    1.19      10.7 +/-    1.19  0.200 / 0.450
G15     123.4          52.2                7.0 +/-    0.61       8.6 +/-    0.61  0.240 / 0.330
G20     247.9          36.9                8.1 +/-    1.75      12.5 +/-    1.75  0.050 / 0.110
G21     316.1          49.4                4.3 +/-    1.27       5.5 +/-    1.27  0.060 / 0.080
G25     198.0          10.6                3.9 +/-    3.42      10.7 +/-    3.42  0.170 / 0.230
G26     292.4          18.7                5.1 +/-    0.76      11.5 +/-    0.76  0.110 / 0.370
G29     149.6          66.9                7.6 +/-    0.61       8.2 +/-    0.61  0.150 / 0.240