PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-17:27:50
G02     50.9           41.1                6.2 +/-    0.78       8.9 +/-    0.78  0.020 / 0.040
G05     78.3           69.2                6.2 +/-    0.36       6.6 +/-    0.36  0.020 / 0.040
G12     183.8          38.6                8.9 +/-    1.30      13.3 +/-    1.30  0.210 / 0.590
G13     133.6          10.1               -7.3 +/-   20.24     -20.3 +/-   20.24  0.200 / 0.620
G21     265.4          12.5                5.6 +/-    4.55      14.7 +/-    4.55  0.050 / 0.090
G25     245.4          56.4                7.9 +/-    0.72       9.2 +/-    0.72  0.060 / 0.080
G29     323.0          46.7                4.6 +/-    0.84       6.1 +/-    0.84  0.040 / 0.060