Results 21 to 30 of about 21,397 (182)
Recovery Following Recurrent Fires Across Mediterranean Ecosystems. [PDF]
Glob Chang BiolMediterranean ecosystems worldwide are frequently affected by fires. Focusing on areas that burned two times over the past 22 years, we study the post‐fire dynamics, applying a statistical model to the time‐series of a remotely sensed proxy for vegetation cover.
Ermitão T +3 more
europepmc +2 more sources
An improved adaptive sidelobe blanker [PDF]
, 2008 We propose a two-stage detector consisting of a subspace detector followed by the whitened adaptive beamformer orthogonal rejection test. The performance analysis shows that it possesses the constant false alarm rate property with respect to the unknown
Bandiera, Francesco +3 more
core +1 more source
Array self-calibration for sky-wave over-the-horizon radar with gain-phase errors
The Journal of Engineering, 2019 This study proposes a novel algorithm for sky-wave over-the-horizon (OTH) radar array self-calibration with angle-independent gain-phase errors. The proposed method exploits backscattered echo from an ionised meteor trail, which can be considered as ...
Baiqiang Zhang, Junhao Xie
doaj +1 more source
Detection in the presence of surprise or undernulled interference [PDF]
, 2007 We consider the problem of detecting a signal of interest in the presence of colored noise, in the case of a covariance mismatch between the test cell and the training samples. More precisely, we consider a situation where an interfering signal (e.g., a
Besson, Olivier
core +1 more source
On convergence of the auxiliary-vector beamformer with rank-deficient covariance matrices [PDF]
, 2009 The auxiliary-vector beamformer is an algorithm that generates iteratively a sequence of beamformers which, under the assumption of a positive definite covariance matrix R, converges to the minimum variance distortionless response beamformer, without ...
Besson, Olivier +2 more
core +1 more source
An ABORT-like detector with improved mismatched signals rejection capabilities [PDF]
, 2008 In this paper, we present a GLRT-based adaptive detection algorithm for extended targets with improved rejection capabilities of mismatched signals. We assume that a set of secondary data is available and that noise returns in primary and secondary data ...
Bandiera, Francesco +2 more
core +1 more source
Performance Analysis of a Sky-Wave Over-the Horizon Radar Simulation Tools
Revista ElektrónThis paper presents the main features of a skywave over-the-horizon radar simulation software and results on its ability to represent and detect different search scenarios.
Zenon Saavedra +4 more
doaj +1 more source
A New Approach to OTH Main Parameters Determination [PDF]
Radioengineering, 2019 In this work, we propose a method based on a simulation that incorporates several models to provide the set of parameters needed on Over-The-Horizon radars (OTHR) performance evaluation, which consists in a versatile software tool.
Z. Saavedra +3 more
doaj
System Identification With Sparse Coprime Sensing [PDF]
, 2010 Given a continuous time LTI system with impulse response h_c(t), it is shown that the uniformly spaced samples h_c(nT) can be identified for any chosen spacing by using an impulse train input with an arbitrarily small rate 1/NT and sampling the system
Pal, Piya, Vaidyanathan, Palghat P.
core +1 more source
JAWRA Journal of the American Water Resources Association, Volume 62, Issue 1, February 2026.ABSTRACT Arizona, located in the Desert Southwest of the U.S., faces chronic water scarcity and has been strongly affected by the multidecadal Millennium Drought. As the state increasingly turns to water augmentation strategies, accurate, high‐resolution estimates of water balance components are essenctial.
Abdul Moiz, Giuseppe Mascaro
wiley +1 more source