PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-22:58:00
G08     294.8          23.4                8.5 +/-    0.73      17.2 +/-    0.73  0.040 / 0.070
G10     2.2            62.8                9.1 +/-    1.15      10.0 +/-    1.15  0.040 / 0.060
G14     227.4          43.3               11.7 +/-    2.46      16.2 +/-    2.46  0.110 / 0.120
G20     61.4           53.7               10.6 +/-    1.08      12.8 +/-    1.08  0.090 / 0.140
G21     145.1          42.9               12.4 +/-    0.87      17.2 +/-    0.87  0.080 / 0.100
G24     56.4           25.0               10.2 +/-    2.38      20.0 +/-    2.38  0.040 / 0.090
G27     258.6          33.0               10.4 +/-    1.64      17.1 +/-    1.64  0.100 / 0.160
G32     241.5          66.7               10.4 +/-    0.77      11.2 +/-    0.77  0.120 / 0.130