SAR Azimuth Resolution Doppler Calculator

Synthetic Aperture Radar (SAR) & Earth Observation: Compute fine azimuth resolution ($\Delta x = L_a / 2$), Doppler bandwidth ($B_D$), synthetic aperture length, and dwell time.

Platform & Radar Geometry

Mission Platform Preset:

Antenna Physical Length $L_a$ (m):

Platform Velocity $V$ (m/s):

Slant Range to Target $R_0$ (km):

Carrier Frequency $f_0$ (GHz):

Swath Incidence Angle $\theta_{\text{inc}}$ (deg):

Chirp Range Bandwidth $B_r$ (MHz):

Synthetic Aperture Imaging Metrics

SAR Azimuth Resolution ($\Delta x_{\text{sar}}$)

-- m

Real Aperture: -- km

Ground Range Resolution ($\Delta R_g$)

-- m

Slant Range: -- m

Synthetic Aperture Length ($L_{\text{sa}}$)

-- km

Integration Time T_sa: -- s

Doppler Bandwidth ($B_D$)

-- kHz

Min Nyquist PRF: -- Hz

The SAR Resolution Paradox:

• $\Delta x_{\text{sar}} = L_a / 2$: Azimuth resolution is completely independent of range and wavelength!

• A smaller physical antenna yields a wider beam, creating a longer synthetic array and finer resolution.

• Real aperture resolution improvement factor: --x

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SAR Azimuth Resolution Doppler Calculator

Platform & Radar Geometry

Synthetic Aperture Imaging Metrics

Frequently Asked Questions