Reconfigurable real-time optronic processor for altitude and look angle adaptability for ENVISAT/ASAR scene observation

Bergeron, Alain; Marchese, Linda; Harnisch, Bernd; Süess, Martin; Doucet, Michel; Bourqui, Pascal; Legros, Mathieu; Desnoyers, Nichola; Guillot, L.; Mercier, Luc; Savard, Maxime; Martel, Anne; Châteauneuf, François

doi:10.1109/igarss.2011.6049958

Cited by 1 publication

(2 citation statements)

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“…[8] Use of scale factors on the raw data displayed on the SLMs provides a simple and efficient way to compensate for variations of the SAR system parameters. Table 3 illustrates the scaling factor required to cover the extreme swaths of the Envisat ASAR system.…”

Section: Phase Correctionsmentioning

confidence: 99%

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A global review of optronic synthetic aperture radar/ladar processing

et al. 2013

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Synthetic aperture (SA) techniques are currently employed in a variety of imaging modalities, such as radar (SAR) and ladar (SAL). The advantage of fine resolution provided by these systems far outweighs the disadvantage of having large amounts of raw data to process to obtain the final image. Digital processors have been the mainstay for synthetic aperture processing since the 1980's; however, the original method was optical that is, it employed lenses and other optical elements. This paper provides a global review of a compact light weight optronic processor that combines optical and digital techniques for ultra-fast generation of synthetic aperture images. The overall design of the optronic processor is detailed, including the optical design and data control and handling. As well, its real-time capabilities are demonstrated. Example ENVISAT/ASAR images generated optronically are also presented and compared with ENVISAT Level 1 products. As well, the extended capabilities of optronic processing, including wavefront correction and interferometry are discussed. Finally, a tabletop synthetic aperture ladar system is introduced and SAL images generated using the exact optronic processor designed for SAR image generation are presented.

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Section: Phase Correctionsmentioning

confidence: 99%

“…[7][8][9][10] In the updated configuration, the film on which the raw data were displayed is now replaced with two spatial light modulators (SLMs), one that operates in amplitude and the other in phase. In this way, the complex raw data are encoded, unlike the analog version where the phase information was lost.…”

Section: Sa Processor Breadboardmentioning

confidence: 99%