Accession Number:

ADA409859

Title:

Synthetic Aperture Ladar (SAL): Fundamental Theory, Design Equations for a Satellite System, and Laboratory Demonstration

Descriptive Note:

Formal rept. May 2001-Dec 2002

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

2002-12-26

Pagination or Media Count:

31.0

Abstract:

The carrier-to-noise ratio CNR resulting from phase-sensitive heterodyne detection in a photon-limited synthetic aperture ladar SAL is developed, propagated through synthetic aperture signal processing, and combined with speckle to give the signal-to-noise ratio SNR of the resulting image. CNR and SNR are defined in such a way as to be familiar to the optical imaging community. Design equations are presented to allow quick assessment of the hardware parameters required for a notional system, most notably optical aperture sizes and the lasers power, chirp, and pulse rate capabilities. Some tutorial information on phase-sensitive heterodyne detection and synthetic aperture image formation is provided. The first two-dimensional synthetic aperture imaging in the optical domain is demonstrated in a laboratory setting.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE