ARGOS: A fractioned geosynchronous SAR

Guarnieri, Andrea Monti; Bombaci, O.; Catalano, Toni; Germani, Chiara; Koppel, Christophe; Rocca, F.; Wadge, G.

doi:10.1016/j.actaastro.2015.11.022

Cited by 11 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…. can be obtained with different solutions" [87] and satellite constellations of both geosynchronous SAR systems [88] and SAR microsatellites able to get revisit times of 1-2 h are expected in the near future [89]. This means a higher capability to monitor the accelerating phase of landslides and a higher capability of sensing the high deformation magnitudes occurring during the pre-failure stage.…”

mentioning

confidence: 99%

The Role of Satellite InSAR for Landslide Forecasting: Limitations and Openings

Moretto

Bozzano

2021

Remote Sensing

View full text Add to dashboard Cite

The paper explores the potential of the satellite advanced differential synthetic aperture radar interferometry (A-DInSAR) technique for the identification of impending slope failure. The advantages and limitations of satellite InSAR in monitoring pre-failure landslide behaviour are addressed in five different case histories back-analysed using data acquired by different satellite missions: Montescaglioso landslide (2013, Italy), Scillato landslide (2015, Italy), Bingham Canyon Mine landslide (2013, UT, USA), Big Sur landslide (2017, CA, USA) and Xinmo landslide (2017, China). This paper aimed at providing a contribution to improve the knowledge within the subject area of landslide forecasting using monitoring data, in particular exploring the suitability of satellite InSAR for spatial and temporal prediction of large landslides. The study confirmed that satellite InSAR can be successful in the early detection of slopes prone to collapse; its limitations due to phase aliasing and low sampling frequency are also underlined. According to the results, we propose a novel landslide predictability classification discerning five different levels of predictability by satellite InSAR. Finally, the big step forward made for landslide forecasting applications since the beginning of the first SAR systems (ERS and Envisat) is shown, highlighting that future perspectives are encouraging thanks to the expected improvement of upcoming satellite missions that could highly increase the capability to monitor landslides’ pre-failure behaviour.

show abstract

mentioning

confidence: 99%

The Role of Satellite InSAR for Landslide Forecasting: Limitations and Openings

Moretto

Bozzano

2021

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…Results of point target and extended target simulation verify that the proposed method can achieve lower sidelobe level compared to existing methods. Further studies will include the applicability of the method when focusing multistatic SAR with single-input-multiple-output (SIMO) [31] and multiple-inputmultiple-output (MIMO) configurations [32][33][34] as well as tomographic imaging [35]. rect rect…”

Section: Discussionmentioning

confidence: 99%

Focusing Multistatic GEO SAR With Two Stationary Receivers Based on Spectrum Gap Alignment and Recovery

Guo,

Yu,

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

View full text Add to dashboard Cite

Multistatic synthetic aperture radar (SAR) composed of a geosynchronous SAR illuminator and two stationary receivers has the ability of continuously monitoring area of interest. The spatially variant azimuth wavenumber spectrum gap caused by the limited synthetic aperture time may result in high sidelobe level, which leads to artifacts in the image. This paper exploits the spatial-invariance of the gap length and proposes a new imaging method to fill the spectrum gap via gap alignment and data recovery. The spectrum gaps of all the targets are aligned based on spectrum shifting, and the full spectrum is recovered using spectrum estimation. Simulation results of point targets and extended targets verify the superiority of the proposed method compared to existing algorithms.

show abstract

“…In this way, the synthetic aperture required to obtain high-resolution images would be obtained in a fraction of the time according to the number of platforms. The coherent combinations of the echoes obtained from different tracks would improve the Signal-to-Noise Ratio (SNR) by a factor of N 2 , leading to metric resolution, a 20-40 min minimum observation time, and multi-polarimetric and interferometric imaging [5,6].…”

Section: Introductionmentioning

confidence: 99%

Interferometric Orbit Determination System for Geosynchronous SAR Missions: Experimental Proof of Concept

et al. 2022

View full text Add to dashboard Cite

Future Geosynchronous Synthetic Aperture Radar (GEOSAR) missions will provide permanent monitoring of continental areas of the planet with revisit times of less than 24 h. Several GEOSAR missions have been studied in the USA, Europe, and China with different applications, including water cycle monitoring and early warning of disasters. GEOSAR missions require unprecedented orbit determination precision in order to form focused Synthetic Aperture Radar (SAR) images from Geosynchronous Orbit (GEO). A precise orbit determination technique based on interferometry is proposed, including a proof of concept based on an experimental interferometer using three antennas separated 10–15 m. They provide continuous orbit observations of present communication satellites operating at GEO as illuminators of opportunity. The relative phases measured between the receivers are used to estimate the satellite position. The experimental results prove the interferometer is able to track GEOSAR satellites based on the transmitted signals. This communication demonstrates the consistency and feasibility of the technique in order to foster further research with longer interferometric baselines that provide observables delivering higher orbital precision.

show abstract

ARGOS: A fractioned geosynchronous SAR

Cited by 11 publications

References 32 publications

The Role of Satellite InSAR for Landslide Forecasting: Limitations and Openings

The Role of Satellite InSAR for Landslide Forecasting: Limitations and Openings

Focusing Multistatic GEO SAR With Two Stationary Receivers Based on Spectrum Gap Alignment and Recovery

Interferometric Orbit Determination System for Geosynchronous SAR Missions: Experimental Proof of Concept

Contact Info

Product

Resources

About