PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/17-12:27:40
G08     303.6          21.8                4.7 +/-    1.71       9.9 +/-    1.71  0.110 / 0.080
G10     344.2          61.6                4.4 +/-    0.63       5.0 +/-    0.63  0.080 / 0.080
G14     220.7          36.6                5.7 +/-    1.30       8.8 +/-    1.30  0.030 / 0.030
G20     47.5           58.0                5.8 +/-    0.60       6.7 +/-    0.60  0.020 / 0.030
G21     138.7          47.0                6.6 +/-    0.57       8.7 +/-    0.57  0.040 / 0.050
G24     65.5           27.9                3.2 +/-    1.18       5.9 +/-    1.18  0.040 / 0.040
G27     271.2          36.0                6.5 +/-    1.51      10.1 +/-    1.51  0.090 / 0.090
G32     227.7          54.0                6.7 +/-    2.68       8.0 +/-    2.68  0.140 / 0.130