# sarscenedopbw

Doppler bandwidth of full scene after azimuth dechirping

Since R2021a

## Syntax

``bwdch = sarscenedopbw(r,lambda,v,wa)``
``bwdch = sarscenedopbw(r,lambda,v,wa,dcang)``

## 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