# sarscenedopbw

Doppler bandwidth of full scene after azimuth dechirping

## Description

example

bwdch = sarscenedopbw(r,lambda,v,wa) returns the Doppler bandwidth of the full scene after azimuth dechirping, corresponding to the composite signal received from all resolution cells within the scene.

example

bwdch = sarscenedopbw(r,lambda,v,wa,dcang) specifies the Doppler cone angle that identifies the direction towards the scene relative to the direction of motion of the array.

## Examples

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A side-looking airborne synthetic aperture radar (SAR) operates in broadside at a wavelength of 0.03 m with a sensor velocity of 100 m/s. The sensor illuminates a scatterer with a Doppler cone angle of ${90}^{\circ }$ at a range of 10 km. The azimuth size of the scene is 916 m. Compute the Doppler bandwidth of the full scene after azimuth dechirping.

lambda = 0.03;
R = 10e3;
v = 100;
Wa = 916;

Compute the Doppler bandwidth.

bwdechirp = sarscenedopbw(R,lambda,v,Wa)
bwdechirp = 610.6667

## Input Arguments

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Range from target to antenna in meters, specified as a positive real scalar or a vector.

Data Types: double

Radar wavelength in meters, specified as a positive real scalar or a vector.

Data Types: double

Sensor velocity in meters per second, specified as a positive real scalar.

Data Types: double

Azimuth size of scene in degrees, specified as a positive real scalar.

Data Types: double

Doppler cone angle in degrees, specified as a scalar in the range [0, 180]. This argument identifies the direction toward the scene relative to the direction of motion of the array.

Data Types: double

## Output Arguments

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Doppler bandwidth of full scene after azimuth dechirping in hertz, returned as a matrix. The rows of bwdch correspond to the range values in r. The columns of bwdch correspond to the wavelength values in lambda.

## Version History

Introduced in R2021a