SETHI / RAMSES-NG: New performances of the flexible multi-spectral airborne remote sensing research platform

International audienceSETHI is an airborne SAR/GMTI system developed by the French Aerospace Lab. ONERA, and integrating various sensors. In 2016 ONERA invested in upgrade and improvement of all SETHI components. The microwave ones cover from VHF-UHF to X Band, full polarimetric and very high resolution, along track and cross track interferometry and very high precision multi-baseline capacity for interferometry and tomography applications. The optronic sensors offer very high spatial resolution visible images and fine spectral scene analysis in VNIR and SWIR bands. This paper presents the upgrade and new performances of this flexible platform and the qualification campaign results with various sensor configurations

Poursuite d'une cible marine coopérative avec une antenne SAR motorisée

International audienceSince 2017, ONERA uses 2-axes motorized antenna to collect SAR images on various geometric acquisitions. Recently, a system has been developed to track maritime targets using the automatic identification system to follow them during illumination time. This paper describes each component of the system and presents all design and implementation steps

Analysis of Bistatic Scattering Behavior of Natural Surfaces

In order to explore the challenges associated with bistatic radar, DLR and ONERA organized a joint bistatic airborne experiment involving E-SAR and RAMSES. This paper relates how the campaign was designed, how some of the challenges were solved, describes the differences found between images acquired with different bistatic angles, and presents the calibration procedure used to radiometrically calibrate the data. Two main geometrical configurations were flown to explore two scientific objective to simulate the cartwheel/pendulum concept (single pass interferometry with a large baseline), to evaluate the improved target characterization provided by the bistatic geometry. In this paper, we analyze the influence of the bistatic angle on the images and on the scattering of natural. This will need to be compared with a similar analysis on incidence angle agilit