rcs = sarSurfaceRCS(sigmaref,freq,freqref,rngazres,grazang,n)
specifies a frequency-dependent proportionality factor that depends upon the target
characteristics.
Estimate the target radar cross-section (RCS) of a side-looking airborne SAR operating at frequencies between 16 GHz to 17 GHz and grazing at 30. The target reflectivity is –25 dB at the Ku band (nominally 16.7 GHz). The radar has a slant range resolution of 15 m and an azimuth resolution of 18 m. Assume a frequency-dependent proportionality factor of 1.
sigmaref — Reflectivity at nominal reference frequency positive real scalar
Reflectivity at nominal reference frequency in square meters per square meter, specified as a
positive real scalar.
Data Types: double
freq — Radar frequency positive real scalar | vector
Radar frequency in hertz, specified as a positive real scalar or a vector.
Data Types: double
freqref — Nominal reference frequency positive real scalar
Nominal reference frequency in hertz, specified as a positive real scalar.
Data Types: double
rngazres — Slant range and azimuth resolutions 1-by-2 row vector of positive real scalars
Slant range and azimuth resolutions, specified as a 1-by-2 row vector of positive
real scalars.
The first element of rngazres specifies the slant range
resolution in meters.
The second element of rngazres specifies the azimuth or
cross-range resolution in meters.
Data Types: double
grazang — Grazing angle scalar in the range [0, 90]
Grazing angle in degrees, specified as a scalar in the range [0,
90].
Data Types: double
n — Frequency-dependent proportionality factor 1 (default) | positive real scalar
Frequency-dependent proportionality factor, specified as a real scalar. For distributed
targets, n varies between 0 and 1. For nondistributed targets,
n is a positive real scalar.
Surface normalized radar cross-section in square meters per square meter, specified
as a nonnegative scalar or row vector. The surface normalized radar cross-section is
also known as the reflectivity or
σ0.
Target radar cross-section for SAR as projected on the ground in square meters,
returned as a scalar or a vector. rcs has the same dimensions as
either freq or nrcs.
Extended Capabilities
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