PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/23-17:58:00
G10     250.4          27.0               12.4 +/-    2.04      23.2 +/-    2.04  0.040 / 0.060
G13     53.5           29.7                9.9 +/-    1.87      17.4 +/-    1.87  0.040 / 0.050
G15     92.8           59.3               10.7 +/-    0.52      12.3 +/-    0.52  0.130 / 0.640
G16     295.9          15.5                7.5 +/-    1.82      18.5 +/-    1.82  0.130 / 0.550
G20     269.6          50.7                9.4 +/-    0.77      11.7 +/-    0.77  0.080 / 0.180
G21     335.3          60.8                9.7 +/-    0.88      11.0 +/-    0.88  0.100 / 0.180
G26     268.8          15.5               10.0 +/-    2.87      24.4 +/-    2.87  0.050 / 0.060
G29     164.2          50.1               10.5 +/-    0.76      13.2 +/-    0.76  0.030 / 0.050