APIS

Fig. 1 APIS demonstrator: (a) the main functional blocks of the APIS system architecture have been highlighted with different colours; (b)-(c) The APIS system has been installed in Paracuellos near the Madrid Barajas airport.
APIS demonstrator: The APIS system has been installed in Paracuellos near the Madrid Barajas airport.
APIS demonstrator: The APIS system has been installed in Paracuellos near the Madrid Barajas airport.
APIS demonstrator geometry: The trajectories of three targets, acquired with an ADS-B (Automatic Dependant Surveillance Broadcast) receiver, are shown with different colours.
2D Range-Doppler maps before (a) and after (b) tracking algorithm. In the measurement plots, colour corresponds to increasing time stamps from red to blue. Real trajectories provide smooth colour transitions. In the trajectory images (b) different object are plot with different colours (blue and purple).
Target Direction of Arrival estimation. It is possible to see: the peak due to the Torrespaña illuminator at 240° for all considered PRIs, a clutter peak at 158 degrees, in the same position for all considered PRIs, corresponding to the direction of another DVBT illuminator, a peak moving between 165° and 171° corresponding to the azimuth position of the target
(a) Airbus 320 (37m length, 34m width). Three ISAR images obtained by using acquired data relative to three different types of airplanes, specifically an Airbus A320, an Airbus A321 and an Airbus 340. The airplanes in (a) and (b) were landing whereas the target in (c) was taking off. The estimated fuselage length of the targets are 33m for the A320, 39m for the A321 and 58m for the A340, which are all consistent with the actual fuselage size.
(b) Airbus 321 (44m length, 34m width). Three ISAR images obtained by using acquired data relative to three different types of airplanes, specifically an Airbus A320, an Airbus A321 and an Airbus 340. The airplanes in (a) and (b) were landing whereas the target in (c) was taking off. The estimated fuselage length of the targets are 33m for the A320, 39m for the A321 and 58m for the A340, which are all consistent with the actual fuselage size.
(c) Airbus 340 family (63-75m length, 60-63 m width). Three ISAR images obtained by using acquired data relative to three different types of airplanes, specifically an Airbus A320, an Airbus A321 and an Airbus 340. The airplanes in (a) and (b) were landing whereas the target in (c) was taking off. The estimated fuselage length of the targets are 33m for the A320, 39m for the A321 and 58m for the A340, which are all consistent with the actual fuselage size.

Array Passive ISAR adaptive processing

The “Array Passive ISAR adaptive processing (APIS)” project has been conceived in the framework of the Defence R&T Joint Investment Programme on Innovative Concepts and Emerging Technologies (JIP-ICET) initiative promoted by the European Defence Agency (EDA). The APIS consortium was constituted by 6 entities, and 4 countries; INDRA Sistemas S.A. (INDRA) (ES), National Interuniversity Consortium for the Telecommunications (CNIT) (IT), VITROCISET SPA (VITRO) (IT), Universidad de Alcalá (UAH) (ES), MTA-SZTAKI (MTA) (HU), University of Cyprus (UCY) (CY). The project has had a total duration of 24 months. The APIS system is defined as a multichannel, multistatic single receiver for array passive radar (PR), and is capable of detecting targets and generating ISAR (Inverse Synthetic Aperture Radar) images for classification purposes.

The APIS system architecture is composed by:

The antenna system: antenna array for the surveillance channel and Yagi for the reference channel.
The RF-Front-End #1 and the calibration network
The RF-Front-End #2 and ADCs
Synchronization signal generator
Digital Signal Processor which implements all the radar signal processing chain.
Passive-Inverse Synthetic Aperture Radar (P-ISAR) signal processing chain

The integration of multiple system capabilities, namely passive radar system concept, array antenna configuration, space adaptive processing and ISAR imaging, all implemented in a single platform, is the main important characteristic of this system.

PUBLICATIONS

2016

F, Berizzi; A., SAVERINO; M, Conti; S, Brisken; M, Ummenhofer; P, Samczynski; M, Baczyk

Multichannel Passive ISAR Imaging for Military Applications (MAPIS) (Inproceeding)

Specialist Meeting NATO SET-231 on Multi-Band Multi-Mode Radar, pp. –, Lisbon, 2016, (MAPIS).

Array Passive ISAR adaptive processing

PUBLICATIONS

2016

2015

2014

2013

2012

2011

2010