Determination of Satellite Solar panel and bus size from radar images with deep learning

Radar systems play a very important role in Space Situational Awareness (SSA) since they are able to provide a wealth of information on remote objects. In particular, imaging radars can characterize space objects using Inverse Synthetic Aperture Radar (ISAR) techniques. Under the right circumstances, ISAR images can provide details of a...

Pulse-to-Pulse Radar-Aided Positioning using Multibeam autofocus

Synthetic aperture radar (SAR) processing on agile radar platforms requires a very accurate estimate of position due to the unpredictable trajectory of such platforms. This is even more challenging in GPS-denied scenarios where the bias in inertial sensors cannot be compensated. In this study, we propose a 3D radar-aided positioning method based...

Radar-Aided Navigation System for Small Drones in GPS-Denied Environments

Continuous navigation is crucial for small drones when flying a pre-planned route or during autonomous flight. In scenarios where a global positioning system (GPS) signal is unavailable, drift in the onboard sensors causes the inertial navigation system (INS) to quickly deviate from the planned route. This paper proposes a radar-aided navigation...

IED Command Wire Detection using Multi-Aspect Processing on SAR Images

In this paper, a wire detection algorithm is proposed for synthetic aperture radar (SAR) images. The algorithm is specifically designed for SAR images generated from an agile, drone-mounted, omnidirectional radar array to be used for the detection of improvised explosive devices (IEDs). A multistage approach consisting of denoising, constant...

Circular Micro-SAR for mini-UAV

This paper presents a new multifunction radar that was specially designed for mini-UAV platforms. The multi-channel radar is omnidirectional, allowing great flexibility in radar- and flight operations. A demonstrator has been built, weighing 800 grams, and consuming 25 W. Flexible SAR, GMTI and novel sensing modes can be demonstrated with this...

SAR interferometry monitoring of subsidence in a detritic basin related to water depletion in the underlying confined carbonate aquifer (Torremolinos, southern Spain)

This research underlines the need to improve water management policies for areas linked to confined karstic aquifers subjected to intensive exploitation, and to develop additional efforts towards monitoring their subsidence evolution. We analyze subsidence related to intensive use of groundwater in a confined karstic aquifer, through the use of...

Multi-temporal InSAR monitoring of the Aswan high dam (Egypt)

The Aswan High Dam, Egypt, was built in the 1960s and is one of the biggest dams in the world. It stopped the seasonal flood of Nile river allowing the urban expansion of cities/villages and the full year cultivation, producing 10x10 9 kWh of power annually. The dam is located in an area where several earthquakes (M L <6) occurred from 1981 to...

Monitoring continuous subsidence in the Costa del Sol (Malaga province, southern Spanish coast) using ERS-1/2, Envisat, and Sentinel-1A/B SAR interferometry

In this paper we analyze the subsidence behavior of a coastal area in the province of Malaga (Costa del Sol), southern Spain, in the period 1992-2018 using C-band SAR interferometry. The area comprises several zones of interest where continuous deformation has happened during the analyzed period. Using SAR data from ESA's ERS-1/2, Envisat, and...

Deformation monitoring of dam infrastructures via spaceborne MT-InSAR. The case of La Vinuela (Malaga, southern Spain)

Dams require continuous security and monitoring programs, integrated with visual inspection and testing in dam surveillance programs. New approaches for dam monitoring focus on multi-sensor integration, taking into account emerging technologies such as GNSS, optic fiber, TLS, InSAR techniques, GBInSAR, GPR, that can be used as complementary data...

Small Reflectors for Ground Motion Monitoring With InSAR

Multi-Temporal InSAR Processing Comparison in Presence of High Topography

In this paper we compare the results obtained by three different InSAR tool packages, StaMPS, SARPROZ and P-SBAS (CNR-IREA) on G-POD for the processing of a mountainous area with up to 2,000 m high differences. For that we use two dataset ERS-1/2 and Envisat ASAR. The area (Sierra Tejeda, southern Spain) is located close to the coast line in the...

Subsidence monitoring in Seville (S Spain) using multi-temporal InSAR

Seville, with a metropolitan population of about 1.5 million, is the capital and largest city of Andalusia (S Spain). It is the 30th most populous municipality in the European Union and contains three UNESCO World Heritage Sites. The Seville harbour, located about 80 km from the Atlantic Ocean, is the only river port in Spain. The city is...

Multi-temporal InSAR evidence of ground subsidence induced by groundwater withdrawal: The Montellano aquifer (SW Spain)

This study uses the InSAR technique to analyse ground subsidence due to intensive exploitation of an aquifer for agricultural and urban purposes in the Montellano town (SW Spain). The detailed deformation maps clearly show that the spatial and temporal extent of subsidence is controlled by piezometric level fluctuations and the thickness of...

Estimation of small surface displacements in the Upper Rhine Graben area from a combined analysis of PS-InSAR, levelling and GNSS data

The intra-plate deformation of the Upper Rhine Graben (URG) located in Central Europe is investigated using geodetic measurement techniques. We present a new approach to calculate a combined velocity field from InSAR, levelling and GNSS measurements. As the expected tectonic movements in the URG area are small (less than 1mma−1), the best...

Behavior Subtraction applied to radar

An algorithm developed for optical images has been applied to radar data. The algorithm, Behavior Subtraction, is based on capturing the dynamics of a scene and detecting anomalous behavior. The radar application is the detection of small surface targets at sea. The sea surface yields the expected stable background dynamics, while a surface...

Deployment and design of bi-directional corner reflectors for op-timal ground motion monitoring using InSAR

SAR interferometry (InSAR) requires coherent radar reflections to measure ground displacements. Howev-er, natural coherent reflectors are not always available due to changes in the scattering properties of the ground, e.g., growing vegetation. Furthermore, the opportunistic nature of InSAR measurements can limit its use for infrastructure...

AMBER: An X-band FMCW digital beam forming synthetic aperture radar for a tactical UAV

An X-band Digital Array Synthetic Aperture Radar for a Short Range Tactical UAV is presented. This system is demonstrated on a manned helicopter and motor glider. The Frequency Modulated Continuous Wave radar principle in combination with digital beam forming over 24 receive channels is used to meet the stringent payload requirements of Tactical...