## Documentation Center |

Surface clutter radar cross section (RCS)

`RCS = surfclutterrcs(NRCS,R,az,el,graz,tau)RCS = surfclutterrcs(NRCS,R,az,el,graz,tau,c)`

` RCS = surfclutterrcs(NRCS,R,az,el,graz,tau)` returns
the radar cross section (RCS) of a clutter patch that is of range

` RCS = surfclutterrcs(NRCS,R,az,el,graz,tau,c)` specifies
the propagation speed in meters per second.

Calculate the RCS of a clutter patch and estimate the clutter-to-noise
ratio at the receiver. Assume that the patch has an NRCS of 1 m^{2}/m^{2} and
is 1000 m away from the radar system. The azimuth
and elevation beamwidths are 1 degree and 3 degrees, respectively.
The grazing angle is 10 degrees. The pulse width is 10 µs. The
radar is operated at a wavelength of 1 cm with a peak power of 5 kw.

```
nrcs = 1; rng = 1000;
az = 1; el = 3; graz = 10;
tau = 10e-6; lambda = 0.01; ppow = 5000;
rcs = surfclutterrcs(nrcs,rng,az,el,graz,tau);
cnr = radareqsnr(lambda,rng,ppow,tau,'rcs',rcs);
```

[1] Richards, M. A. *Fundamentals
of Radar Signal Processing*. New York: McGraw-Hill, 2005,
pp. 57–63.

`grazingang` | `phitheta2azel` | `radareqsnr` | `surfacegamma` | `uv2azel`

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