PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/25-21:13:00
G08     305.6          20.7               11.3 +/-    1.81      24.5 +/-    1.81  0.040 / 0.080
G10     337.0          60.7               11.9 +/-    0.48      13.4 +/-    0.48  0.050 / 0.090
G14     220.2          35.2               16.8 +/-    0.95      26.6 +/-    0.95  0.060 / 0.080
G18     45.3           57.4               12.4 +/-    0.42      14.4 +/-    0.42  0.060 / 0.080
G21     137.0          50.7               16.3 +/-    0.60      20.4 +/-    0.60  0.070 / 0.100
G24     71.5           30.3               12.0 +/-    0.74      20.9 +/-    0.74  0.060 / 0.100
G27     268.6          36.9               14.4 +/-    0.92      22.1 +/-    0.92  0.070 / 0.140
G32     226.6          52.8               14.2 +/-    1.03      17.4 +/-    1.03  0.050 / 0.150