sarminaperture

Lower bound on antenna area for SAR

Since R2021a

Syntax

aac = sarminaperture(r,lambda,v,grazang)

aac = sarminaperture(r,lambda,v,grazang,dcang)

Description

aac = sarminaperture(r,lambda,v,grazang) returns the lower bound on antenna area based on synthetic aperture radar (SAR) constraints.

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

Examples

Lower Bound on Antenna Area

Estimate the antenna area constraint of a side-looking airborne SAR operating in broadside at 16.7 GHz with a sensor velocity of 100 m/s for a target range of 10 km. Assume a nominal grazing angle of ${30}^{\circ }$.

fc = 16.7e9;
lambda = freq2wavelen(fc);
grazang =30;
v = 100;
R = 10e3;

Compute the antenna area constraint.

area = sarminaperture(R,lambda,v,grazang)

area = 4.1486e-04

Input Arguments

r — Range from target to antenna

positive real scalar | vector

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

Data Types: double

lambda — Radar wavelength

positive real scalar | vector

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

Data Types: double

v — Sensor velocity

positive real scalar

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

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

dcang — Doppler cone angle

90 (default) | scalar in the range [0, 180]

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

aac — Upper bound on area coverage rate

matrix

Upper bound on area coverage rate in square meters per second, returned as a matrix. The rows of aac correspond to the range values in r. The columns of aac correspond to the wavelength values in lambda.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2021a